'Memba These Stars?!

12/22/2007 5:00 AM PST

'Memba These Stars?!

After falling off the Hollywood radar, some of the biggest celebrities of the past have recently resurfaced at various events across the country. Where ya been, Joyce DeWitt?!

Check out TMZ's age-defying gallery -- and see if stars like "Northern Exposure's" Janine Turner or "The Partridge Family's" David Cassidy have been able to weather time -- or if they just look weathered!