The first 'Grease' movie was everything you could ever hope for from a musical. It had great songs, a phenomenal cast, a huge sense of fun, and an enjoyable story. 'Grease 2' had very few of those things, and has such a low profile that there are still people out there that don't know there was ever a follow-up made to the original movie at all. If you haven't seen it, you're best advised to keep it that way. Michelle Pfeiffer certainly doesn't want you watching it.
With the benefit of hindsight, she'd never have agreed to appear in the film. She blames her own youth and naivety for accepting the role, going on to state that she 'hated it with a passion,' and when seeing it for the first time at the premiere 'couldn't believe how bad it was.' We're guessing something must have got lost in translation from the script to the screen.