Steamy! Andy Cohen kisses and tells about hooking up with Lance Bass

Well we didn't see that coming.

On April 28, RHONY flauntepreneur Sonja Morgan took a tip from Teresa Giudice and flipped the tables on Watch What Happens Live host Andy Cohen.

During a Q&A, Cohen answered some very personal questions including the most famous person he's ever slept with. Drum roll, please!

It was Lance Bass!

Now, the host with the most didn't go into detail about how, er, *NSync the two were, but he did reveal a pattern of liking younger guys. In fact his current celebrity crush is Zac Efron (well, he certainly has good taste).