Two years after duetting with Mariah Carey on her MTV Unplugged rendition of "I'll Be There," Trey Lorenz provided background vocals on "Switch" for TLC. Though Lorenz later backed up Beyoncé, Aretha Franklin and Usher, he's still collaborating with Carey all these years later. She released his solo album Mr. Mista through her MonarC label in 2006, which often takes him on tour. In 2011 Lorenz turned to club music, hitting No. 1 on the U.K. dance charts via his featured role on DJ Tony Moran's "Can I Love U More."