Kendrick Lamar surprised fans with two verses on Taylor Swift's latest single "Bad Blood."

The 2015 Billboard Music Awards kicked off last night live from the MGM Grand Garden Arena in Las Vegas, Nevada.

Billboard's annual award show was filled with several Hip Hop moments throughout the night. Pharrell Williams and Iggy Azalea nabbed three awards a piece. Azalea won two of the three main Hip Hop categories, beating J. Cole, Rae Sremmurd, Drake, and Nicki Minaj in the Top Rap Artist category. "Fancy" featuring Charlie XCX won the Top Rap Song award.

Fall Out Boy and Wiz Khalifa joined forces to perform "Uma Thurman." Wiz also did a rendition of his chart-topping Fast & Furious 7 single "See You Again." Chris Brown and Pitbull performed together and Nicki Minaj debuted a new single titled "The Night Is Still Young." The night's last performer, Kanye West, took to the stage for a pyro-laden performance of "All Day" and Yeezus' "Black Skinheads."

One of the most anticipated moments of the award show was the unveiling of Taylor Swift's action-packed "Bad Blood" video. While it was previously announced that Kendrick Lamar was set to star in the music video, Lamar surprised fans with two verses on Swift's latest single.

Check out the night's Hip Hop winners below:

TOP RAP ARTIST
Iggy Azalea -- WINNER
J. Cole
Drake
Nicki Minaj
Rae Sremmurd

TOP RAP ALBUM
J. Cole, 2014 Forest Hills Drive -- WINNER
Drake, If You're Reading This It's Too Late
Nicki Minaj, The Pinkprint
Iggy Azalea, The New Classic
Eminem, The Marshall Mathers LP 2

TOP RAP ARTIST
Iggy Azalea -- WINNER
J. Cole
Drake
Nicki Minaj
Rae Sremmurd

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