5 Seconds of Summer Make Billboard Music Awards 'Perfect'!

5 Seconds of Summer rock out the stage for their performance at the 2014 Billboard Music Awards held at the MGM Grand Garden Arena on Sunday (May 18) in Las Vegas.

The guys — Calum Hood, Michael Clifford, Ashton Irwin, and Luke Hemmings — were introduced by Kendall and Kylie Jenner at the show, where they wowed the crowd with new single, “She Looks So Perfect”.

PHOTOS: Check out the latest pics of 5 Seconds of Summer

“Today was amazing, all the other artists on the show are epic too, how’s everyone doin, I’m excited for “don’t stop” video to be out ???? xo” the band wrote on Twitter after the show wrapped.

Check out their performance below!