The Big Bang Theory: 21 Easter Eggs You Probably Missed
4. "Dress Up As Blossom"
In the same episode that Howard and Bernadette 'blued' up for the smurfs fancy dress party, Sheldon and Amy were locked in discussions over which character pairing they would go as. On the list you'll see Blossom and Joey from TV drama, Blossom.
The titular character is actually played by Mayim Bialik, the actress behind Amy Farah Fowler, throwing the entire Big Bang universe into chaos. Two Mayim Bialiks? A different Blossom? Who knows.