She is the mother of singers Beyoncé and Solange Knowles, and is the ex-wife of Mathew Knowles, the manager of Destiny"s Child as well as Beyoncé and Kelly Rowland until 2011. Tina Knowles worked as a beautician until 1990 when she opened the salon Headliners, located in Houston. The salon went on to become one of the most famous hair businesses in Houston.
Tina"s rise to prominence came as costume designer for Destiny"s Child.
In the early days of her daughter"s career, when money was limited, she created outfits that the members wore on-stage and to events. In 2002, she published a book titled Destiny"s Style: Bootylicious Fashion, Beauty and Lifestyle Secrets From Destiny"s Child in which she discussed how fashion had an impact on Destiny"s Child"s success.
The book was published through the company HarperCollins. In 2004, Tina Knowles launched the clothing line House of Deréon alongside Beyoncé named after Agnes Deréon.
On November 22, 2010, Knowles appeared with Beyoncé on The View to promote her clothing line called "Mission Tina by Tina Knowles".
In 2009, she expanded the line to Walmart after it was previously being sold on the Home Shopping Network. The pieces are designed to make the woman look leaner and taller." In early 2010, Tina Knowles again collaborated with Beyoncé to open the Beyoncé Cosmetology Center at the Phoenix House in Brooklyn.