I don't see the resemblance between Alexis and Sasha either. Christina Ricci, when she is very thin, looks almost exactly like Sasha IMO. Around 02 season, Sasha looked a lot like Thora Birch, not so much any more.
Chloe and Angela are like twins!
I always thought young Hillary Duff looked a lot like Tara Lipinski. I also noticed a resemblance between Jayne Torville and Tara.
Around 03 season, Tanith looked a lot like Julia Roberts (like in Stepmom). I think it was the eyebrows and smile that made them seem very similar.
Emily Hughes looks like Alyson Hannigan (Willow from Buffy).
Kimmie M. looks like she'd be related to that kid from 3rd Rock from the Sun...umm, Levitt? Can't remember his name.
Jahnke looks like a young Boitano.
umm who else? oh, and since Mindy from Beauty and the Geek was mentioned, she looks a lot like Isabelle Delobel and nothing like Sasha.
Sahknovsky (sp?) reminds me of Dracula. LOL