T-Swizz shut down the competition!

Taylor Swift was the big winner at last night's Billboard Music Awards in Las Vegas, walking away with a total of eight trophies! The "Bad Blood" singer took home the prize for Top Artist, Top Female Artist, Top Billboard 200 Artist, Top Digital Song Artist, Top Billboard 200 Album, Top Streaming Song, and the Billboard Achievement Award.

The belle of the ball's new beau Calvin Harris didn't walk away empty handed, either! The Scottish DJ won Top Dance/Electronic Artist, and received a smooch from Tay Tay upon the announcement. Guess that makes their relationship official!

Falling shortly behind the "Shake It Off" songstress was Iggy Azalea, who scored three wins for Top Rap Artist, Top Rap Song, and Top Streaming Artist. British crooner Sam Smith took home the prize for Top Male Artist and New Artist, while One Direction scored Top Touring Artist and Top Duo or Group.

For the full list of winners click thru...