Belinda Carlisle should show up on the list too...
Back in the early part of the last decade I swear all those 80s MTV mall vixens started showing up in Playboy... Tiffany, Debbie Gibson, and Belinda Carlisle all made appearances, au naturale (with a little help from the airbrush) in Hef's mag within a span of about 3 or 4 years.
Actually, a former (softcore) **** star did become a singer in the 1980s: Samatha Fox
And here's a one hit wonder who got my attention because the band was named after a Star Trek character: T'Pau
http://www.youtube.com/watch?v=SwrYMWoqg5w&feature=relatedAnd for those who just have to know what character: she was in the episode "Amok Time" in the original series, who was a member of the Vulcan ruling class, who was supposed to officiate at Spock's wedding -which, of course, turns into a fight to the death between Kirk and Spock.