Is Joss Stone’s butt up to the task?

Joss Stone’s butt is apparently causing Gap some problems. Seeing clips of her new TV commercial, Stone was shocked to notice that Gap decided to use butt doubles for certain shots. “All those bum shots? They’re not mine. They’re other girls’. That’s not my bum, I promise,” the 18-year-old British singer told the AP. “Apparently, I need a J. Lo bum or something,” she added, before joking to her publicists: “Bring in the implants, girls.”