Aerosmith were on top of the world when they began work on Pump in early 1989. When the decade began the group was down two members and playing clubs while Steven Tyler struggled to control his horrific drug addiction. They were now back together again and, somehow, one of the biggest names in rock. Working with outside songwriters helped propel Permanent Vacation up the charts, so it made perfect sense to repeat the formula. Desmond Child helped with "F.I.N.E" and Jim Vallance c0-wrote "Young Lust." But this time around, the biggest hits — including "Janie's Got a Gun" and "Love in an Elevator" — were written without any help. The group was getting better at penning sleek, radio-friendly tunes. Many huge rock groups of the late 1980s melted into dust when the 1990s began, but somehow Aerosmith just got bigger.