Rapper SHAWN 'JAY-Z' CARTER recruited celebrity pals including Mariah Carey, Nas and Sean Combs to star in his new music video - so that the clip would look like a genuine party. The 99 Problems hitmaker wanted to "celebrate" on the set of the video for Roc Boys, and called in his longtime collaborators Memphis Bleek, Beanie Sigel and Freeway to help him party with the stars. Jay-Z tells MTV.com, "The (new single) 'Roc Boys' is the height of celebration. You can't celebrate by yourself, so I invited all these great people to be a part of the video. "It just felt like a celebration. It was natural." The Roc Boys is the second single to be taken from his new album, American Gangster.