_Peak Time_ celebrates the birth of two R&B greats today: Sade and Aaliyah. We toast the 60th birthday of the British-Nigerian singer who gave us such classy, sensual '80s hits as "Smooth Operator" and "Sweetest Taboo" by talking to Stuart Matthewman, Sade's longtime songwriting partner and a member of her band since the _Diamond Life_ days of the mid-'80s. Also joining us to talk about Ms. Adu's inimitable style is John McSwain, one of the DJs behind Sade Night, a party that happens in New York and Los Angeles. At the 2PM hour, we pay tribute to Aaliyah, the "Queen of Urban Pop," whose silky, airy soprano defined the street-but-sweet flavor of '90s R&B. It would have been Aaliyah's 40th birthday today (she died in a plane crash in 2001) and her sound is as wildly influential as ever – artists such as Qween Beat's leading light MikeQ and Portland R&B vocalist Reva Devito join us to discuss Aaliyah's legacy.