We were first introduced to 5 Seconds of Summer when One Direction announced they would be the opening act of their Take Me Home Tour. Since then, the band has absolutely blown up. Besides headlining their own convention and releasing song after song that we're obsessed with, the guys are even nominated for multiple J-14 Teen Icon Awards this year!

Unsurprisingly, we're not the only ones who have fallen in love with 5SOS. There are plenty of celebrities who are secretly obsessed with the band too! Click through, and let us know who shocked you the most with their 5 Seconds of Summer love in the comments.