WATCH: 5 Seconds of Summer Prank And Surprise Fans

JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news.Click here to buy your tickets now, before they sell out!

Check out the full lineup for this year's iHeartRadio Music Festival

Listen to 5 Seconds of Summer Radio on iHeartRadio

The guys of 5 Seconds of Summer have some VERY dedicated fans. The band appeared on "Jimmy Kimmel Live" this week, and naturally, an army of very excited female fans were lined up and camped out overnight to support their favorite Australians.

[5 Seconds of Summer Performs As Part of the iHeartRadio Live Series!]

In honor of the crowd of admirers at the TV studio, Jimmy helped 5SOS play a hilarious prank on the legion of ladies. One by one, each girl stepped into a room with a TV in front of them, thinking they were going to send a special message to the band ... until one of the guys appeared on the screen telling them they were trying to break the world record for most fan kisses in one day, through the video chat. 

What happens next is hilarious. Find out what happened as each girl closed her eyes and puckered up!


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