Fall Out Boy's Patrick Stump appeared as surprise guest at New Jersey Taylor Swift concert

Fall Out Boy's Patrick Stump joined pop singer Taylor Swift at her concert this evening at MetLife Stadium in East Rutherford, NJ, to perform FOB's single “My Songs Know What You Did In The Dark (Light Em Up).”

It it not uncommon for Swift to perform with special guests, however this is her first time hosting Stump at a show. Check out posts about the performance, from both artists:

Tonight was a show I'll NEVER forget. That insane MetLife Stadium crowd and a surprise guest performance by @patrickstump of @falloutboy!!

— Taylor Swift (@taylorswift13) July 14, 2013

@taylorswift13 Thanks for having me onstage! That was amazing.

— Patrick Stump (@PatrickStump) July 14, 2013

And here's a full video of the duo performing together:

Much like her love for Paramore and Jimmy Eat World, Swift has long been a vocal fan of Fall Out Boy. Back in the spring, the singer declared her affinity for “My Songs Know…” on Twitter:

I've listened to “My Songs Know What You Did In The Dark” by @FallOutBoy 43 times today.

— Taylor Swift (@taylorswift13) March 26, 2013

And way back 2011, Taylor covered the group's hit “Sugar, We're Going Down,” at a performance in Chicago:

Taylor Swift is currently in the midst of her RED world tour, while Fall Out Boy are gearing up for a tour of Europe and Asia, followed by a North American arena tour in the fall.