In 2008, Mosley starred with Lenelle Moise in "Expatriate", a gritty off-Broadway show at the Culture Project. Her performance earned rave reviews from the "New York Times", "Time Out New York" and "Variety", which wrote: "Mosley's voice is a serious discovery, with remarkable phrasing and range. In a torchy number called 'The Makings,' about how Alphine's life has given her the makings of a jazz legend, her pure high notes descend to earthy growls in a flash, and you've got to believe her when she sings, 'Anything I wails/hits ears like honey.'" In 2008 she also nabbed parts in "Law & Order" and "Gossip Girl" and appeared in "Museum Pieces" at the West End Theater in New York City.