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Who woulda guessed?!

Justin Timberlake scored seven wins at the Billboard Music Awards in Las Vegas tonight, including top artist and top male artist.

Other big winners included Pharrell, whose single "Happy" topped the charts earlier this year, Robin Thicke, T.I. and Vegas locals Imagine Dragons who all took home four awards each.

Jennifer Lopez was presented the Icon Award and took the stage with Pitbull to perform the FIFA World Cup anthem, "We Are One (Ole Ola)." Miley Cyrus also hit center stage, along with Katy Perry, Iggy Azalea, Ariana Grande and Michael Jackson -- yes, MJ made an appearance in holographic form.

Ludacris hosted the show which aired live on ABC from the MGM Grand Arena. A complete list of winners is after the jump.