What is the difference between whose and who's???

Kittypal

Look Here.

Whose is the possesive form of who.
Who's is a contraction for who is.

A good way to remember it is that the possessives of other prononuns don't have apostrophes, (he->his, she->her, etc.), but the contractions do (he->he's, she->she's).

Thufferin thuccothash, I shoulda known that!!!