Taylor Swift, Justin Bieber, Beyoncé Take Billboard Awards

It was just like 2010 all over again: Taylor Swift was the first winner of the night at Sunday's 2011 Billboard Music Awards, where she was named 200 Album Artist of the Year – for Speak Now.

More than two hours later, she collected another trophy, as Country Artist of the Year. "I'm just havin' the best time doin' this," she said.

Justin Bieber was a triple winner, as Digital Artist of the Year, Top New Artist and Fan Favorite – great excuses to hug and kiss his seat mate in the audience of Las Vegas's MGM Grand: Selena Gomez.

On stage, sporting a gold lamé tuxedo jacket, the "Baby" singer, 17, thanked his fans, as well as his mother and "my whole family, [talent manager] Scooter Braun, Usher – basically everyone who helped me get out of my hometown and live my dream."

As PEOPLE reported from the rehearsal, a ravishingly redheaded Rihanna opened the show with her song "S&M" before being joined a black-masked Britney Spears. Keep Reading +

Taylor Swift, Justin Bieber, Beyoncé Take Billboard Awards

It was just like 2010 all over again: Taylor Swift was the first winner of the night at Sunday's 2011 Billboard Music Awards, where she was named 200 Album Artist of the Year – for Speak Now.

More than two hours later, she collected another trophy, as Country Artist of the Year. "I'm just havin' the best time doin' this," she said.

Justin Bieber was a triple winner, as Digital Artist of the Year, Top New Artist and Fan Favorite – great excuses to hug and kiss his seat mate in the audience of Las Vegas's MGM Grand: Selena Gomez.

On stage, sporting a gold lamé tuxedo jacket, the "Baby" singer, 17, thanked his fans, as well as his mother and "my whole family, [talent manager] Scooter Braun, Usher – basically everyone who helped me get out of my hometown and live my dream."

As PEOPLE reported from the rehearsal, a ravishingly redheaded Rihanna opened the show with her song "S&M" before being joined a black-masked Britney Spears. Keep Reading +