We hear that pop-punks Good Charlotte will be among the guests appearing on Ludacris’ sixth solo album, (tentatively titled Theater of the Mind, due out in August), and the hip-hop artist reveals that he has someone in mind for another collab as well. “I’d like to work with Eminem,” he told EW.com at the InStyle Grammy Salute to Fashion on Friday. “I think we could make something hot, but who knows? It hasn’t happened — yet.” Meanwhile, the rapper and movie star (Fred Claus, Crash) is expanding his portfolio yet again, partnering with Bay Area restaurateur Chris Yeo on Straits, an upscale Asian restaurant set to open in Atlanta this fall. Luda also just launched wemix.com, an online American Idol-style contest with a focus on beats and songwriting, which he hopes to bring to cable TV soon.