Rebecca Vieney went missing from the retail store at around 5 p.m.
Police believe the girl is with a suspect identified simply as "Bree," and could be traveling in a white Nissan Altima with Florida tags. They could be en route to Killeen, Texas.
The Oklahoma Highway Patrol and McAlester police issued a "missing endangered juvenile" alert for Rebecca, who was last seen wearing a pink shirt with the word "LOVE" written on it, blue jeans and Angry Bird shoes.
Anyone with information about the abduction is urged to call McAlester police at 918-423-1212.