It is on episode when Chucky is trying to impress that girl by being some Russian dude. He keeps on switching between Chucky and that Russian dude, and then finally the girl finds out he isn't really Russian. They talk for about a minute then go back into the Guava Lava(Or whatever Chucky's Dad's coffee shop is called). After they go in she tells him they are all funny and it cuts away for about 2 seconds and her hair is black. It then goes back to another person talking and it goes back again and her hair is brown again.