“I Kissed A Girl” singer Katy Perry is getting ready to finally say goodbye to the single life to become Mrs. Russell Brand with the help of some friends, who threw her a memorable bachelorette party in Las Vegas on Saturday (September 18).

Katy Perry & Russell Brand Wedding In Maui

Katy, singer Rihanna and 25 of her closest friends enjoyed a fantastic performance of KÀ by Cirque du Soleil at MGM Grand (more pictures below). They even went backstage for a special meet-and-greet with the cast and then headed out to dinner and to go party at a club all night long.

Katy Perry & Josh Kloss In Steamy “Teenage Dream” VIDEO

Poor Katy almost didn’t make it to her own bachelorette party since her fiancé was arrested after attacking a photographer, who allegedly tried to take an upskirt snap of the singer, at LAX airport in Los Angeles on Friday (September 17)- read more details HERE.

Katy Perry & Rihanna At Bachelorette Party Pictures

[images: RadarOnline]