Here are a few examples:
* "Werewolves of London" by Warren Zevon became "Werewolves of Brooklyn": This one is a classic, featuring Fallon singing about a wolf-like character roaming the streets of Brooklyn.
* "Thriller" by Michael Jackson became "Thrilling": A slightly less known one, with Fallon singing about the excitement of Halloween night.
* "Baby Got Back" by Sir Mix-a-Lot became "Pumpkin Got Back": This one is about finding a big, round pumpkin for Halloween.
These are just a few examples. Jimmy Fallon is known for his creative and funny song parodies on SNL and beyond.