Virenia "Nia" Peeples (born December 10, 1961) is an American R&B and dance music singer and actress. Peeples is known for playing Nicole Chapman on the hit TV series Fame; Pam Fields on the drama Pretty Little Liars; Karen Taylor Winters on The Young and the Restless and Sydney Cooke on Walker, Texas Ranger. Her most recent television role was Grace's mom, Susan, on The Fosters.