OK so I'm really not all that bad of a Momma. I feel I should give a list of all the words Lily says so it doesn't look like "Sponge Bob" is the only words she says. :) By the way, she calls Diego "Sponge Bob" also. Not sure what that says...
Aggie (the cat, she uses this for most animals)
Reese (her friend at school)
Back (her version of "Give It Back!")
*edited to add:
There are more... I just can't think of them right now.