Well here's a topical sketch idea I just had. Doesn't have a strong finish though, so any ideas are appreciated.
Int. Stage
Lily Allen enters and looks at the audience.
Lily: Hello, Lily Allen here! Welcome to my new show ‘Lily No Mates’. It’s part of a new BBC3 campaign against obesity. We’re all sick to death of podgy little teenage couch potatoes, so who better to drive them out of the house than me! My cheap mockney accent combined with hackneyed production techniques guarantees that kids stay away from the telly for good. And if there’s any kids still left watching, we do have a contingency plan. To make you lose those extra pounds, I'm gonna sing and scare you guys shitless.
Ends