R&B superstar and five-time Grammy winner Tionne “T-Boz” Watkins, best known as one-third of the chart-topping group TLC, will guest-star on DAYS as a dangerous inmate, Sheila, who sets her sights on terrorizing Hope behind bars, reports EW. She debuts on November 30 and will appear through January. Look for an interview with the singer/actress in an upcoming issue of Digest.