Britney -- Total Butt-head

6/15/2007 11:43 AM PDT
Britney Spears, butt-flashing mother of two, still likes smokin' butts, but her lighter wouldn't let her.

TMZ spotted the on-the-rebound pop star outside Millenium Dance Complex on Thursday, where she put her lengthy legs on display in short shorts and high heels. Unlit ciggy in hand, Brit attempted to take a smoke break from a long day of dancing, but the formerly smokin' hot lil' thing's lighter just wasn't working.

Neither her cousin Alli nor a bodyguard could help get her cancer sticks lit ... which is too bad, since smoking before a vigorous dance workout is always refreshing.