‘Whitney, A Look Back,’ an Entertainment Tonight special, airs Saturday, April 2, at 8 p.m. ET/PT on CBS. The special includes rare performance and interview footage of the late icon, as well as brand new interviews with the people who knew her best: her sister-in-law Pat Houston, singers Monica, Kelly Price and CeCe Winans, her aunt, Dionne Warwick, and music executive Clive Davis.