Men In Black 3 star Will Smith revealed during a promotional appearance in Rio last week that pop star Lady Gaga has filmed a cameo appearance in the upcoming sequel. He told website ElCorilloRD.com that there were a couple of surprise celebrity cameos, but he didn’t want to reveal who they were, although he then went on to admit Lady Gaga was one of the stars who would appear in the movie. Former Pussycat Doll singer Nicole Scherzinger also plays a role in the film, though more substantial. Co-starring opposite Smith as a young Agent K is Josh Brolin, as Agent J goes back in time to 1969 to prevent his partner’s death. The film opens in theaters on May 25, 2012.