The big sign that Valerie was bad news (for the other ladies of the 90210, anyway)? One word: Chokers.
The Ray, Claire and Valerie years were tough ones for the gang but really good for Kelly and Donna's hair.
There was nothing more late-1990s than a slip dress, so of course Toni Marchette wore one on her wedding day. A bullet-proof vest would have been a better choice, unfortunately.
Donna went from virginal blond to less-virginal brunette.
Donna went all out, no pun intended, for the night she lost her virginity to David.
Only when the gang was cloaked in black college graduation robes did it look as if these pictures could be taken in any decade.
Donna of course wore a picture-perfect dress when she finally married David in the series finale. Well, presumably she married David. Both David and Dylan are wearing the same thing.
PHOTOS: We Ranked All of Beverly Hills 90210's Best Couples