It was ladies' night at the 2011 American Music Awards on Sunday night.
So yes, girls rule. But the big question is: Who won Artist of the Year?
The "Back to December" singer, who also won Favorite Female Country Artist and Favorite Country Album, thanked her family, friends and fans...and Selena Gomez, who she called, "my little sister I never had!" Cutest. BFFs. Ever.
Minaj opened the show with a performance of her hit song "SuperBass," and after winning Favorite Rap/Hip-Hop Artist Minaj actually gave a shout-out to Swift for her support. Swift rocked out with Gomez during Minaj's performance, they even memorized the rap! Girl power, indeed!
Perry received an achievement award for being the first female artist to have five No. 1 singles from a single album (Teenage Dream). The singer, who rocked pink hair, performed her new hit single, "The One That Got Away."
"It's been up and down and just exciting and overwhelming and so many things," said Lopez—who performed twice during the show—after winning the award for favorite Latin Music Artist.
It wasn't a trophy-laden night for last year's Artist of the Year winner Justin Bieber, who lost Pop/Rock Male Artist to Bruno Mars and Artist of the Year. Stll, Bieber walked the red carpet with girlfriend Gomez, performed his holiday single "Under the Mistletoe" and donned skintight animal-print pants to join LMFAO onstage when they closed the show with "Party Rock Anthem." Also joining the band on stage? David Hasslehoff.
What a way to end the night!
Take a look at the complete list of winners at the 2011 AMAs:
ARTIST OF THE YEAR
• Taylor Swift
• Male Artist: Bruno Mars
• Female Artist: Adele
• Band, Duo or Group: Maroon 5
• Album: Adele, 21
• Male Artist: Usher
• Female Artist: Beyonce
• Album: Rihanna, Loud
• Artist: Nicki Minaj
• Album: Nicki Minaj, Pink Friday
• Male Artist: Blake Shelton
• Female Artist: Taylor Swift
• Band, Duo or Group: Lady Antebellum
• Album: Taylor Swift, Speak Now
• Artist: Adele
• Artist: Foo Fighters
• Artist: Jennifer Lopez
• Artist: Casting Crowns
SPRINT NEW ARTIST OF THE YEAR
• Hot Chelle Rae