Let's see:  two people pretend to challenge each other to a duel, they stand back to back, take a few paces, turn and then each opens a can of soda, chugs it as fast as possible and then the one who burps first, wins the duel.  Kinda rude, but hysterical!  Or play the piano with your feet or with your back to the keys, sing a song off-key, play an instrument you have no idea how to play. One time the mother/daughter act performed a ballet dance to some music, of course they had no ballet training/experience.  Read a poem or story in an exaggerated manner.  Hope this gets the creative juices rolling.

She dressed up as an opera singer - long black skirt, white blouse (I believe she even enhanced her 'bosom') wig, big jewelry, extreme makeup etc... She stepped out from the curtain and prepared to sing - and she ended up lip-syncing to a song recorded by Paul Robeson - a very deep bass! She was extremely dramatic and I just remember how funny it was. Another sister of mine danced to a ballet from "Swan Lake". She emerged from behind the curtain in a full, tulle skirt - white with black dots on it. She had fashioned herself a large duck bill that she wore over her face and was wearing flippers on her feet that you use when swimming. Again it was hilarious.

I included things like opera singer, yoga instructor, sign language interpreter, etc. The young women or leaders presenting the activity provide props and music. List of all 25 creative "talents" and a complete list of supplies, including suggested music (which
makes all the difference in the "show") are in this book p. 55-56. Or just invent your own version.

Best of luck - I know several seminary classes do this now for their annual party - get those guys tap dancing! They love the attention, it's wholesome fun, and doesn't add any stress to the youth for having to prepare something in advance.