Hanson hit number one for three weeks on the Billboard Hot 100 with “MMMBop” on this date in 1997, but the fact is, that “Ba du bop, ba duba dop” hasn’t left anyone’s head for the last 19 years. And speaking of “MMMBop’s” ability to live in the back of your mind for nearly two decades, a lot of music from the 90’s had a comparable smash hit, “it” factor quality. Here are 15 songs thatll give you flashbacks to rewinding your Titanic VHS tape for the thousandth time and talking to your girlfriends about the new Spice World movie while trying not to get tangled up in the cord of your landline.