Leave it to Nicki Minaj and her Barbz & Kenz to turn a typically only slightly rambunctious but with a touch of snob appeal type event into an all-out mob scene.  When Drake hit the 1's and 2's tonight at the Versace boutique on NY's 5th Avenue to help celebrate Fashion's Night Out, Nicki Minaj and Jay-Z stopped by to visit.  And so did stacks on stacks of fans--causing a police controlled mob scene outside the store.

Pics and deets inside....

Most of the hundreds of fans outside never even got a whiff of inside the Versace store tonight.  But the crowds were so large and spilling over into the streets, and the crowds inside were busting at the seams, we hear the police had to shut it down.

Drake made a guest appearance as a celeb DJ for tonight's event.  His Young Money labelmate Nicki stopped by.  And so did Mr. Shawn Carter.  Apparently that was just too much star power for the fans to handle, because Nicki was whisked out of the store and on to the after parties once police started shutting down the hoopla.

Folks were all a-twitter about the madness going on.   Check out some pics:

She rocked a Geisha look for the occasion.  And I see her anger-management needing man Sarafee aint going NOWHERE.

Nicki's fans tweeted her about mobbing her and trailing her all night:

She hit the Giuseppe store, YSL store, and is on her way to some after parties.  Good luck with that.