Ricky Church
Stole Timberlake's Spaceship-Coupe
The second Becky on Roseanne was horrible. That was some of the worst acting I've ever seen on a sitcom. She was so bad that they actually brought the first one back on several occasions.
I still can't believe the second Becky got to play Elliot on Scrubs. She was a bit better there, but still.
Roseanne?

I don't even remember when they changed Harriet on Family Matters, I was young.