The Time Machine heads to 1990 this time. There were big debuts from the Black Crowes and A Tribe Called Quest. Deee-Lite's first single was big all over the world. Uncle Tupelo kickstarted the alternative country genre, Sinead O'Connor issued her most successful work. Cheers was the top show on TV, and the Detroit Pistons became just the third NBA team to win consecutive NBA championships. It's all 1990, our year on Time Machine Tuesday.