Rihanna [1], Jim Parsons, and Steve Martin [2] are the unlikely trio at the center of the new animated film Home, which hits theaters today. The film tells the story of an outer-space species called the Boov, who invade earth and displace all the humans, including Rihanna's character Tip. Home actually marks the first time Rihanna's ever voiced a role for film or television, and at a recent press day in New York City with Jim and Steve, she confessed to what was the biggest challenge in making the movie.