One fan got the ultimate fan experience when MTV flew her out to 5 Seconds of Summer's show and put her right on the tour bus with the band. So not only did she get to go to their concert -- she got to hang out with Luke, Calum, Ashton and Michael. I told you it was the ultimate experience!

MTV and Applebee's brought Kaitlyn Rose and a friend to Atlanta to meet face-to-face with 5SOS, who played her an acoustic song and chatted about their upcoming album, Sounds Good Feels Good.

"It's a once in a lifetime experience that I'll never forget," she told us after meeting the guys. "I can't stop smiling."

Watch how it all went down:

Here they are with the band!

Selfies with the guys.

Kaitlyn didn't want to constantly take pics, but she was able to capture this one on the bus.

She got to stand front row at the concert.

'So magical. Thanks again, @5sos, for an incredible night.'

'Still doesn't feel real...'