Miranda Lambert's mother Beverly is definitely the singer's best friend. They've always been close, except early in Lambert's career, when Bev was her manager. "She'd say, 'I want you to go back to being my mom!' It was a tough time," the elder Lambert told People in 2009. These days, the one-time private investigator runs the singer's fan club and occasionally goes out on the road with her. You'll find a tribute to mom on Miranda's 'Four the Record' album. The new Mrs. Shelton is singing from experience when she belts out the lyrics to 'Mama's Broken Heart.'