Trenyce is a singer and actress best known as a finalist on the second season of American Idol and for her work in musical theatre. Raised in Memphis, Tennessee, Trenyce won one of the categories of the NAACP ACT-SO as a teenager, and attended the University of Memphis on a music scholarship.
In 2004, Trenyce began to focus on theatre, playing roles in the plays Not a Day Goes By, The Vagina Monologues, Soul Kittens Cabaret and Mama's Sweet Potato Pie. In 2006, she played the lead role of Deena Jones in an Indianapolis production of the musical Dreamgirls. She made her film debut in 2008 and became the first American Idol contestant to headline a show in Las Vegas. She originated the role of Portia in David E. Talbert's play Love in the Nick of Tyme. Trenyce performed in a 2009 North American tour of the musical Ain't Misbehavin'.
From 2010 to 2013, she was the leading female vocalist in the revue Thriller – Live during a European tour and its West End run. She appeared in the 2013 comedy film Kick-Ass 2. In 2015, Trenyce hosted the Franco Dragone-produced cabaret show Taboo at the casino City of Dreams in Macau, China. She then returned to London for an extended reprise of her role in Thriller – Live. In 2017, she starred in the cabaret production Heart & Soul: Music of Whitney Houston, Dionne Warwick & Diana Ross, in California. In the same year, she played Diana Ross in a North American tour of Motown: The Musical.