Singer Katy Perry wore another pink ensemble by Vivienne Westwood to match her pink hair on the red carpet of the 2011 American Music Awards (AMAs) held at the Nokia Theatre L.A. Live in Los Angeles, California on Sunday (November 20)- more pictures below.

2011 AMAs: American Music Awards Winners (FULL List)

The 27 year-old performed a rendition of the song “The One That Got Away” on stage (video here) and took home the Special Award for being the first female to reach five number one singles from the same album (“Teenage Dream”).

The music video for “The One That Got Away” also starring Diego Luna, tells the story of an epic love inspired by “The Notebook” – watch video HERE.

Katy Perry @ 2011 AMAs Red Carpet Pictures

[images: Adriana M. Barraza /wenn.com]