Nicki Minaj suffered an embarrassing wardrobe malfunction as she kicked off her first U.K. arena tour on Sunday (21Oct12) after her bustier slipped down to expose her nipple.

The curvaceous Super Bass hitmaker was performing at the Capital FM Arena in Nottingham, England when her right nipple popped out of her sparkly corset dress during the energetic Va Va Voom track, but she ignored the fashion mishap and continued on with the show.

After completing the tune, she addressed the overexposure and told the crowd, "You guys have seen my boobs before. You won't tell anyone, will you? What happens in Nottingham..."

The hip-hop star's figure-hugging outfit slid a little too low once again during the concert finale as she belted out her smash hit Starships, but this time Nicki Minaj had apparently tried to preserve her modesty in between tracks by placing adhesive tape, decorated with love hearts, over her nipples, which became visible as she closed out the gig.

However, the rapper had warned audience members earlier in the night not to be too surprised if her or her dancers' stage costumes exposed a little more than expected, telling them: "This is our first show so excuse any boobs popping out or any penises popping out!"

It's not the first time Nicki Minaj has faced a nip-slip onstage - she accidentally exposed her breast while performing live in New York's Central Park for breakfast show Good Morning America last year (11).