Superstar Mariah Carey suffered an embarrassing wardrobe malfunction while performing at a concert in Atlanta, Georgia last weekend (23Feb13) after her strapless dress slipped down to reveal part of her nipple.

The Hero hitmaker made a special appearance at the Fox Theater to celebrate the 20th anniversary of producer and longtime pal Jermaine Dupri's So So Def Recordings on Saturday night and helped to wheel out a huge cake onstage to mark the label's milestone.

However, her moment in the spotlight has been overshadowed by a minor nip-slip - photographers snapped the areola of Carey's left breast peeking out of the top of her form-fitting cream mini dress.

The singer was oblivious to the fashion flub at the gig, which featured performances from Jay Z, Usher, Ludacris, Bow Wow and Kris Kross, and smiled and waved to fans in the audience as she presented the cake to Dupri.