There’s trouble in paradise again for Twilight co-stars Robert Pattinson and Kristen Stewart, who have split for the second time in a year.

Pattison and Stewart, who had reconciled following her cheating scandal with Rupert Sanders, were battling a long distance relationship.

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“They again went from spending every second together, to spending more time apart at their separate houses,” a source told reporters. “Kristen has been in a terrible mood, and it was obvious that things were not great with Rob.”

Stewart was noticeably absent for Pattinson’s 27th birthday party, leading onlookers to believe a split was imminent.

“It was very strange that they didn’t celebrate Rob’s birthday together,” the source said. “He had friends over at his house, but Kristen was not part of the celebration. For the past few days, they have not spent any time together.”

Kristen Stewart in a terrible mood?! Why, I don’t believe it! She looks like such a happy person!

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The Vampire Diaries costars Nina Dobrev and Ian Somerhalder have split after three years of dating, an insider confirmed to reporters.

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The actors are “consummate professionals,” the insider said, adding that they “will continue to work together and remain best friends, which is where the relationship started.”

The CW show is currently in it’s fourth season, but has been renewed for a fifth. Filming begins later this year.

Reps for Dobrev and Somerhalder declined to comment.

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It looks as if pop singer Justin Bieber and actress-singer Selena Gomez are reuniting.

Gomez, 20, travelled to Oslo, Norway to be with Bieber, 19, who was there for a concert on Thursday.

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“They were holding hands, hugging and they kissed on the lips,” a source told reporters about the couple, who officially split in November 2012. ”They looked really in love, like no fights ever happened before. It definitely looked like they were back together.”

Bieber was spotted visiting Gomez’s Los Angeles home in early March. He will remain in Europe for his Believe tour.

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Pop singer Katy Perry and musician John Mayer have split for a second time during their whirlwind romance.

The couple, who began casually dating last summer, have been spending a lot of time apart despite reports that Mayer spent the holidays with Perry’s family and even took his girl house hunting. So what gives?

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Their reps declined to comment, but a source close to Perry told PEOPLE she’s been showing signs of unhappiness to friends. ”She gets really withdrawn when there’s a change in a relationship,” the source said, adding that during a recent conversation with the singer, “she didn’t mention [Mayer] at all.”

On March 15, Perry Tweeted a link to the song “Landfill,” which includes the lyrics:  ”I want you so much, but I hate your guts I hate you.”

Yikes! Can’t say I’m surprised. It’s John Mayer! What’s happened to your taste in me, Katy?

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Actress Rosario Dawson and filmmaker Danny Boyle have split.

“From the outside it looks like there’s a lot of dissimilarities, but we actually have a lot in common. We’re really similar people. He’s a very kind man,” Dawson told reporters during an interview in October 2012. ”It was just one of those things where we were going to just go our separate ways had someone not said something.”

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The two, who began dating after production on their upcoming film Trance wrapped, recently reunited during a press junket, and the tension was reportedly palpable. ”Rosario and Danny didn’t interact during interviews,” a source said. “It was pretty obvious they’re no longer a couple.” The insider added: ”He was talking to a group of people when she arrived and it was awkward — like a cold greeting, no hug, and they got through it as quickly as possible.”

Dawson previously dated French DJ French DJ Mathieu Schreyer from 2008 to 2011.

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American Idol host Ryan Seacrest and Safe Haven actress Julianne Hough have split after two years together, sources have confirmed.

The couple, who began dating in 2010, have broken up reportedly due to their increasingly busy schedules.

“Honestly, their schedules were too hectic,” a source told reporters. “It just got to be too much. I think they both just sort of knew they couldn’t do it anymore. The travel and lifestyle got to be too much. Who knows if this is just for now, but I think this is for good.”

Julianne Hough Shows Off Bikini Body With Ryan Seacrest (PHOTO)

Last month, Hough, 24, told reporters she didn’t know if she would get to see Seacrest, 38, for Valentine’s Day because of their schedule.

“I know there are plans, but I don’t know what they are yet,” she said in February. “I think I might be traveling. I’m not sure where. That’s up to my boyfriend!”

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Singer Rita Ora has denied that she was ever in a romantic relationship with reality star Rob Kardashian.

Ora and Kardashian appeared to be in a relationship last year before they called things off in December due to her busy schedule. Kardashian slammed Ora on Twitter after their split claiming that she had been cheating on him during their courtship with “20 dudes.” He later denied the comments were about her.

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However, Ora recently said during an interview that she never considered Kardashian her boyfriend. “I never thought it was actually a relationship, in all honesty,” she told Australia’s Daily Telegraph.

“I never mentally defined it as ‘boyfriend, girlfriend’. When I split up with him, I said, ‘It’s because I’m never there, I don’t know how to do it’. That’s all I said, then… the rest happened. He obviously felt that creating myths was the way forward. But I don’t think about it. I don’t vocalise things that don’t deserve attention… In my world, things like that just aren’t important.”

Ummm….ouch….

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Canandian actors Alison Pill and Jay Baruchel have officially broken up and called off their two-year engagement.

Baruchel, who has appeared in movies like Tropic Thunder, hinted that he and Pill had split on his Twitter account Feb. 16. ”Alone again, naturally. Heartbroken,” he wrote in a Tweet that he later deleted. “I won’t be on twitter for awhile gang. Getting dumped rules.”

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The couple had planned to be married in Quebec in September 2012, but the wedding never happened. Baruchel told reporters in an interview last month why the wedding never took place: “Unfortunately, we’re two busy people who are intrinsically lazy,” he said. “So in our free time, the last thing we want to do is book flights and organize hotel rooms for people.” He added, “But it’ll happen at some point.”

Pill, 27, attended the 30th annual PaleyFest for her HBO show The Newsroom on March 3 solo. Noticeably missing was her engagement ring from Baruchel, 30.

A source told UsMagazine that the two ended things due to stress from maintaining a long distance relationship. ”Working and living in Canada is something that [Baruchel] is very passionate about. He wanted her up there more often, but she really likes Newsroom and the opportunities that are there for her,” the source said. “They were doing the long distance [thing] a lot.”

Baruchel’s rep has not commented.

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Actress Rachel McAdams and actor Michael Sheen have split after two years together.

The couple, who met on the set of Midnight in Paris, were seemingly happy together, gushing about the other in interviews with magazines, etc. So what went wrong?

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When they went public with their relationship, Sheen, 44, told People that McAdams is ”talented, intelligent, beautiful. She’s warm and friendly. She’s very supportive, and very kind, very funny. She makes me laugh a lot.”

And McAdams, 34, sang Sheen’s praises, too. She told Stella magazine in January 2012 that they spend as much time together as possible. ”Michael and I never spend more than three weeks apart … but you have to be quite adaptable in this business whether you are in a relationship or not.”

Sheen has a 14-year-old daughter with Kate Beckinsale. The two perviously dated for eight years. McAdams was linked to her The Notebook co-star Ryan Gosling for two years before breaking things off in 2007.

News is surfacing that Oz the Great and Powerful actress Michelle Williams and How I Met Your Mother actor Jason Segel have split after what seemed to be a happy year together.

Michelle Williams Dating Jason Segel (PHOTO)

The two, who kept their romance relatively private, were photographed together less than a month ago vacationing in Cancun with Williams’ best friend, actress Busy Phillipps.

Sources claim that Williams, who has a 7-year-old daughter named Matilda from her relationship with the late Heath Ledger, and Segel couldn’t cope with the distance; Williams lives in New York City, while Segel films his sitcom in Los Angeles.

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Dancing With the Stars pros Maksim Chmerkovskiy and Peta Murgatroyd have split after dating for almost 10 months.

Sources say that Chmerkovskiy, who was previously engaged to Dancing pro Karina Smirnoff, broke things off with Murgatroyd two weeks before Valentine’s Day. He was reportedly spotted with other women during New York’s Fashion Week.

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“He wasn’t feeling her anymore,” an insider told reporters.

Another source told reporters Murgatroyd ”didn’t want it to end.” Adding, “It will be very heated between them when the [new] season starts in a few weeks.”

Chmerkovskiy’s rep denied comment on the breakup.

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Taylor Swift appeared to be mocking her ex-boyfriend, One Direction’s Harry Styles, when she put on an English accent during her performance at the Grammy’s on Sunday night.

The country singer opened the awards show with her hit song ‘We are Never Ever Getting Back Together’, and seemed to be using the song as an attack on Styles, whom she had a short-lived relationship with at the end of 2012.

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During the spoken part of the song, Swift put on the accent and changed the words to: ”I’m sorry, I’m busy opening up the Grammys. We are never getting back together. Like, ever.”

To watch the video and decide for yourself, click HERE.

Keep it classy, Swift.

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