Hear Taylor Swift's "I Knew You Were In Trouble," with guest vocals from Nicolas Cage.

Featured mashup videos of the week, including 'Argo', 'Home Alone', 'Real Genius', and a bunch of yelling goats improving Bon Jovi and other musicians.

Taylor Swift and a goat beautifully duet on her "I Knew You Were Trouble."

Every few weeks Conan has Nick Offerman on to read tweets from young female celebrities and it rarely fails to crack me up.

Samuel L. Jackson covered Taylor Swift's "We Are Never Ever Getting Back Together" on a London radio show last week, with some Jackson-isms thrown in there.

After Tina Fey made fun of Taylor Swift at the Golden Globes, Swift's fans were quick to share their feelings on Twitter about the "30 Rock" creator.

Taylor Swift and the Jackson 5 get confusingly mashed up, while the Beatles and Led Zeppelin come together for some madness. Happy Birthday Jimmy Page!

Now that T-Swift's split with Boyfriend #64, here are five people she can get with next.

Remember that LCD Soundsystem-Miles Davis YouTube "Duet"? That was pretty awesome, right? Yeah, this is nothing like that.