Express has unveiled a new clothing line just in time for the holidays, and the ad for the collection showcases the song ‘Heartbeat’ by indie-pop supergroup JJAMZ.

The band features James Valentine of Maroon 5, Jason Boesel of Rilo Kiley/Bright Eyes, Alex Greenwald of Phantom Planet, Michael Runion and Elizabeth "Z" Berg of the Like. ‘Heartbeat’ appears on JJAMZ's debut album, ‘Suicide Pact,’ which hit stores back in July via Dangerbird Records.

Katy Perry tweeted about her love for the track, and it was also used in a recent promo video for MySpace. Click here for a free download of the catchy tune.

After wrapping up a brief fall tour with the Hush Sound, JJAMZ are scheduled to open for No Doubt at the Gibson Amphitheatre in Los Angeles on Thursday, Dec. 6. They’ve certainly been busy lately, and according to their lead vocalist, they don’t plan on slowing down anytime soon.

"I don't think any of us thought we would be able to do this for real, but then all of our bands broke up or took breaks," said Berg in a statement. "This is our real focus and complete commitment right now. The path is, tour until we can't stand it and then make another album and do it again."

Hear JJAMZ’s ‘Heartbeat’ in the Express Holiday 2012 Commercial

More From