The former Mr. Britney Spears enjoys the occasional cigarette.

Or the constant cigarette. This is hardly anything new, we know.

But when he was spotted getting his puff on in L.A. Thursday, Sean Preston and Jayden James' daddy was at dinner with girlfriend Victoria Prince, and reportedly left their date at a local T.G.I. Friday's for about 20 minutes to do so.

"He left the table to go chain-smoke outside," a fellow diner reports.

Victoria Prince, a former volleyball standout with a bit of an interesting past, may not have been too thrilled about Kevin Federline's lengthy disappearance.

Says the source, "He was talking to some other girls outside, and when he finally came back to the table, his girlfriend looked pissed and they started to argue."

If she wasn't pissed about K-Fed's smoke break and new pals, perhaps it was over the report that he has been boning Britney in her tour dressing rooms?

Probably not, since she supposedly walked in on them in mid-fornication. But that's almost certainly a BS story (albeit a hilarious one) anyway. We digress.

Speaking of smoking, and Britney Spears, she abruptly halted her Vancouver concert this week due to excessive cigarette smoke. At a concert. Pretty weak sauce, Brit. Tough it out. It's not like there's any actual singing going on.

Who the heck is Victoria Prince? Click to enlarge more pics: