5 Seconds of Summer's North American leg of their Rock Out With Your Socks Out Tour is going great!

Ashton Irwin & Bryana Holly Are An Item Or Were?

On Monday they performed in Irvine, Calif., which they were really excited for as they shared the limited edition poster very early in the morning on their Twitter.

Later in the day before the gig, Ashton Irwin, Michael Clifford and Calum Hood recorded a video thanking their fans for showing so much support for "She's Kinda Hot," which has been added into their set list since it released.

Watch 5 Seconds of Summer's Lyric Video For 'She's Kinda Hot'

Some snaps of the band backstage and setting up for the show were posted too!

Anyway, during the Aussies set they brought out special guests. Benji and Joel Madden of Good Charlotte. They all sang the popular "Girls & Boys" summer of 2003 hit as seen below in a fan-captured video.

Luke Hemmings and his bandmates all fangirl over the Maddens in the video and on Twitter Hemmings continued to do so after the show.

"Show tonight was awesome, played a song with my first ever favourite band," he gushed, adding, "14 year old me is stoked."

Hood gushed on Twitter too about how awesome the gig in Irvine was, calling the town "mvp."

Irwin called the gig "insane," which seems pretty accurate since the crowd was awesome and he and his bandmates were joined on stage by some of their idols.

Benji and Joel also posted pictures from 5SOS' set and Benji showed just how happy he is with how far they've come.

 proud of our @5SOS boys

A photo posted by The B-man (@benjaminmadden) on Jul 21, 2015 at 1:49am PDT

 

Don't stop A photo posted by Joel Madden (@joelmadden) on Jul 20, 2015 at 9:22pm PDT

The band continues their tour in Concord tonight, July 21.

Tags: 5 seconds of summer Benji Madden joel madden Music