Taylor Swift returned to the stage for her “Lover.” The Grammy Award winner, 35, gave a surprise performance at boyfriend Travis Kelce’s Tight Ends & Friends concert at the Brooklyn Bowl Nashville on Tuesday. She sang an acoustic version of her 2014 hit song “Shake It Off” in her first performance since her Eras Tour wrapped in December.

Here’s what to know about Tight End University after Taylor Swift's surprise performance during a benefit concert at Nashville's Brooklyn Bowl.