Dreamgirls (2007)

Set in the turbulent early 1960s to mid-70s, Dreamgirls follows the rise of a trio of women - Effie, Deena and Lorrell - who have formed a promising girl group called The Dreamettes. At a talent competition, they are discovered by an ambitious manager named Curtis Taylor, Jr., who offers them the opportunity of a lifetime.

Official website: http://www.dreamgirlsmovie.com/