Although she and her son, Sean Preston, both accompanied him to Las Vegas, Britney Spears took a pass on attending K-Fed’s album listening party.

(NOTE: Size of photos indicative of who has more talent.)

Apparently, Spears and K-Fed – real name Kevin Federline, of course – were spotted pre-show at Nero…a restaurant in Caesar’s Palace…having a discussion. Said discussion, however, apparently ended in tears, and Britney departed, presumably returning to their room. Bystanders may or may not have suggested that the waterworks began when K-Fed made the simple request to “act like you’re enjoying the album.”