Who said "Be yourself; everyone else is already taken."?

This quote is attributed to Mushu.

Be yourself; everyone else is already taken. - Mushu

"Be yourself; everyone else is already taken."

Mushu

"I'm gonna help you become a man. You'll need all the help you can get."

"Now, when I say 'giddy up,' you giddy up, okay?"

"You've got to take a whole new approach. I'm thinking... how about this? Curl up like a ball!"

"You're a man now. You can do things that I can't."