Mariah Carey, who says she had to drink “ugly juice” for her unglamorous role in Precious, and Nick Cannon were inseparable as they walked the red carpet, along with Oprah, Mary J. Blige, Will Smith, Paula Abdul, and Robin Thicke, at the AFI Fest screening of Precious: Based on the Novel ‘Push’ by Sapphire at Grauman’s Chinese Theatre in Hollywood on Sunday (Nov. 1). The film opens in select theaters Friday.