Remember the Last Time Selena Gomez and Taylor Swift Performed Together

Selena Gomez just hit the stage with best friend Taylor Swift at Los Angeles's Staples Center to perform her new song "Good For You" during Taylor's 1989 tour. But as massive as this duet was, it wasn't the first time the pair has sung together. Selena reminded us of the first time she joined Taylor on tour with a sweet Instagram post, saying: "I just can't wait to tell our kids we ACTUALLY got to perform in front of thousands of insanely beautiful people together. TWICE!" In 2011, during Taylor's Speak Now tour, Selena performed her song "Who Says" at New York's Madison Square Garden. Keep scrolling to see video and more photos of that old performance, then check out all the times Selena showed us she's all grown up.