On May 1, 1991, Lyte performed on "Yo! Unplugged Rap", the first MTV Unplugged to feature rap artists, alongside A Tribe Called Quest, De La Soul and LL Cool J. Her performance was praised by Entertainment Weekly's Ken Tucker, who commented "MC Lyte performed her song ”Cappucino" like a rapping Aretha Franklin: Lyte brought out the soul in her lyrics." In September 1991 Lyte released her third album, "Act Like You Know", featuring a new jack swing sound. Even though singles "Poor Georgie" and "When in Love" peaked at # 1 and # 3 on the Hot Rap Singles respectively, the album fell in the charts, only peaking at #102 on the Billboard 200 and #14 on the Top R&B/Hip-Hop Albums and reviews were generally mixed. That year she also participated in the socially conscious single "Heal Yourself" by the collective "HEAL Human Education Against Lies", which also included Big Daddy Kane, Boogie Down Productions, Run-DMC, Queen Latifah and LL Cool J.