Nicki Minaj -- Forget My Weird Butt ... Check Out My Underboob!

Nicki Minaj attempted to erase the bizarre butt cheeks image Friday night in France ... by flashing a whole lotta underboob.

Minaj hit up Club 79 in Paris after a surprise appearance at Beyonce's concert ... and it was clear the singer was trying her best to distract the attention away from her ass ... for once.

In case you missed it ... N.M. performed at the "Fashion Rocks" event Tuesday in NYC and during the gig photogs snapped an awkward shot of her glutes.