There's nothing "Ironic" about this pairing! As Taylor Swift is wont to do, she brought out yet another amazing guest at L.A.'s Staples Center on Monday, Aug. 24. Her fellow Queen of the Breakup Anthem, Alanis Morissette, took the stage to perform an epic duet of her 1995 classic, "You Oughta Know."
"She defined the music of her decade," Swift, 25, told the audience as she introduced the Canadian rocker, 41. "She inspired a generation of confessional female singer-songwriters who all of a sudden felt like you could actually say these raw feelings that you had. You could actually sing about your real life, you could put detail to it, you could get really, really mad if you wanted to."
The "Bad Blood" crooner added, "I think it's fair to say that so many of the female singer-songwriters of my generation, including myself, would not write the way that we do without her and her music. And she has written some of the most brilliant music—in particular probably inarguably the greatest breakup song of all-time."
With that, Morissette walked on the stage, and the two broke into song. Watch it here:
Of course, the "Hand in My Pocket" singer wasn't Swift's only guest that night. The blonde beauty, who's been dating DJ Calvin Harris since this past spring, also shared the stage with Ellen DeGeneres, who strutted her stuff in a sparkly onesie for "Style." Later that night, the Dixie Chicks' Natalie Maines rocked out to "Goodbye Earl" with Swift.
Morissette, DeGeneres, and Maines join a long list of fabulous guests Swift has had on her tour so far, including Julia Roberts, Mary J. Blige, Chris Rock, Mariska Hargitay, The Weeknd, Fifth Harmony, and the U.S. women's national soccer team.
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!