J-Lo, we're on to you.

The newly single Jennifer Lopez and sexy "Hangover" actor Bradley Cooper had dinner on Saturday night at New York City's super-fancy Per Se restaurant, People reports.

Of course, they say it's all business.

"[They are] in discussions regarding a project," a source tells the mag.

SODAHEAD SLIDESHOW: See the stars who had the spiciest rebound relationships.

But that doesn't really explain why Lopez, 42, and Cooper, 37, were sitting together this morning at New York Fashion Week's Tommy Hilfiger show. Hanging out on Saturday night AND on Monday morning? That's a little much for business partners ...

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Plus, history tends to repeat itself, and J-Lo has had her share of rebound relationships in the past. Lopez began dating (and quickly married) Marc Anthony just weeks after she broke off her engagement to Ben Affleck. Before that, she married back-up dancer Chris Judd soon after calling it quits with P. Diddy.

PHOTOS: See the latest celebrity pictures to hit the Internet.

Cooper, meanwhile, broke up with Renee Zellweger earlier this year, and has since been linked (in the rumor mill at least) to Olivia Wilde.

From J-Lo and Brad to Brad and Angelina to Madonna and Jesus, let us know: Who had the spiciest rebound relationship?

<a href="http://www.sodahead.com/entertainment/jennifer-lopez-and-bradley-cooper-spotted-together-who-had-the-spiciest-rebound-relationship/question-2153877/" title="Jennifer Lopez and Bradley Cooper Spotted Together: Who Had the Spiciest Rebound Relationship?">Jennifer Lopez and Bradley Cooper Spotted Together: Who Had the Spiciest Rebound Relationship?</a>