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Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for "Red," and top country song for "We Are Never Ever Getting Back Together." Image Credit: AP

Pop stars Justin Bieber and Taylor Swift won the big prizes on Sunday at the Billboard Music Awards, which also honored legendary performers Madonna and Prince.

Bieber, who was named top male artist, also performed at the show at the MGM Grand Garden Arena in Las Vegas. He also took home Billboard’s first Milestone Award, chosen by fans, for musical innovation and ingenuity.

“I’m 19 years old. I think I’m doing a pretty good job," Bieber said. “It should really be about the music. This is not a gimmick. I’m an artist and I should be taken seriously. And all this other bull should not be spoken of.”

The teen heartthrob did not elaborate, but in recent months he has been involved in several high-profile incidents ranging from driving offenses to reports of hard partying and drugs being found on his tour bus in Sweden.

Swift won the top award of the night, artist of the year. She thanked her fans by telling them: “You are the longest and best relationship I’ve ever had.”

Pop diva Madonna was named top touring artist for her “MDNA Tour,” 2012’s highest-grossing concert series.

Madonna strode onstage to accept the accolade from will.i.am, wearing black fishnet stockings, garters and a padlock choker.

The MDNA tour grossed more than $305 million from 88 sold-out shows and attracted an audience of 2.2 million people. Madonna acknowledged her fans, saying: “A showgirl needs her fans. Thank you for supporting me for three decades.”

She also thanked her four children for being “incredibly supportive.”

The Billboard Music Awards, hosted by “30 Rock” star Tracy Morgan, opened with Bruno Mars performing “Treasure.”

Nicki Minaj took home the top rap artist honor. “I definitely did not expect this one,” she said, wearing a bright red dress.

She later performed “High School” with Lil Wayne and gave the rapper a provocative lap dance onstage.

Carly Rae Jepsen’s “Call Me Maybe” was named top digital song, while Swift took home the top Billboard 200 album award for “Red.”

French producer and DJ David Guetta was named top electric dance music artist.

But the awards show, airing live from MGM Grand Garden Arena in Las Vegas on ABC, is less about the trophies - which reflect success on the Billboard charts - and more about the performances. Selena Gomez sang her seductive new hit, “Come & Get It,” while Chris Brown danced around the stage to his latest single, “Fine China,” though his voice began to crack during the performance. Duo Macklemore & Ryan Lewis also performed their massive hit, “Thrift Shop,” which won top rap song.

“First and foremost, gotta thank Goodwill, gotta thank Value Village,” Macklemore said to laughs.

Kid Rock, who presented the award, sparked controversy when he told the crowd, “Let’s give it up for people lip-synching under pre-recorded music.”

Among musical highlights, Bieber performed “Take You,” which was chosen by his fans via Twitter, before pairing up with will.i.am for “#ThatPOWER.”

Other musical pairings included Jennifer Lopez and Pitbull singing “#LiveItUp,” and Christina Aguilera and Pitbull singing “Feel This Moment.”

Icona Pop, South Korea rap sensation Psy and Swift, who was nominated for 11 Billboard awards and received eight, performed as well.

In an apparently unscripted moment, Miguel, performing “Adorn,” leapt from the stage and landed feet-first atop two young women. No mention was made on the broadcast as to whether they were injured.

The show ended with the Icon Award for Prince, in recognition of his unique career and accomplishments in the music industry. Prince performed a medley to close the show, but did not deliver an acceptance speech.