John Doe John Doe of X performed a new track entitled "Never Enough" on Late Night with David Letterman last week. Check out the video below.

Doe's latest solo album Keeper was released late last month via Yep Roc. X, meanwhile, continue their celebration of the thirtieth anniversary of Los Angeles with performances scheduled at Riot Fest East in Philadelphia, Riot Fest in Chicago and Fun Fun Fun Fest in Austin.

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