Andy Cohen turned the tables on "Watch What Happens Live" this week and let "Real Housewives of New York" star Sonja Morgan grill him with some intimate and revealing questions.
Cohen's most interesting revelation while in the hot seat? The most famous person he's ever slept with is none other than Lance Bass of *NSYNC.
Other juicy tidbits spilled include his favorite housewife (Vicky from Orange County), his newest celebrity crush (Zac Efron), and the craziest place he's ever had sex (under the bleachers at Hollywood High School).
Also -- and we're jealous of this one -- Cohen apparently has Madonna's number in his phonebook!
Check out the segment above to hear more.