According to ABC, reality star and host of The Real Tamar Braxton has joined the Dancing with the Stars Season 21 cast! Tamar is a Grammy-nominated singer, talk show host, and reality television personality. A veteran performer who began singing backup vocals for her older sister Toni at age 12, Tamar Braxton was also a founding member of R&B group The Braxtons with Toni and their siblings Traci, Towanda and Trina. Tamar's third solo album, Calling All Lovers, releases September 11, 2015. Tamar executive produces and stars with her sisters in the WE tv reality hitBraxton Family Values, as well as the spinoff Tamar & Vince, with her music manager husband Vince Herbert. Elsewhere on the TV front, Braxton co-hosts and produces the daytime talk show, The Real. The Season 21 Premiere of Dancing with the Stars, is MONDAY SEPT 14 8|7c on ABC. Watch the cast reveal below on Good Morning America.