Who is 5 Seconds of Summer?

Have you herd that song She Looks So Perfect? It's by the band 5 Seconds of Summer. they are from Sydney Austrulia made up of Luke Hemmings on lead vocals, Michael Clifford on guitar, Calum Hood on bass guitar and Ashton Irwin on drums. The band started in 2011 and got started doing cover song YouTube videos, and by last year were opening for One Direction.

Check out the video for their song She Looks So Perfect: