Kelly Rowland performed at Club 4Sixty6 on Sunday when her black bra-like top rode up and her breasts were exposed.
The former "Destiny's Child" star eventually adjusted her bustier after noticing the problem.
She later tweeted, "New Jersey crowd was amazing!! hope you enjoyed the show and didn't mind the peekaboo LOL!!!... Stuff happens."
On Friday, Nicki Minaj also accidentally exposed her breast on "Good Morning America."