Gabby Sidibe On Her 'N Sync Obsession: "I Know, I Know, I'm Totally Geeky!"

In a hilarious interview on last night's Tonight Show With Conan O'Brien, Gabby Sidibe recalled her hardcore teenage obsession with 'N Sync, admitting that she attended 23 concerts and that she knows all of their birthdays. Clip after the jump.

Click to view