What TV show is this from? Guy insists his friend takes his sister to a

[Amanda P]

party, but it's just him in a wig? It was a comedy, and the friend insists he takes his sister to a party, and it's him in a wig. He says he knows it's him in a wig, and the friend keeps insisting it's his sister, and everyone says they know it's him. I have no idea what this is from and it is bugging me! Thank you