The ladies had quite the Twitter misunderstanding the other day when a Swiftie posted a meme comparing Taylor's fan meet and greets to Avril's. There was talk that Taylor "liked" the post, and that her boyfriend Calvin Harris even chimed in, but it seems like things are all gravy now.
"So incredible sharing the stage with @AvrilLavigne!" Taylor tweeted shortly after the performance. "'Complicated' is such a brilliant pop song and I just love her."
Yep, the two belted out Avril's big hit from back in the day. #PerfectFitting for their little feud, don't you think?
Avril had nothing but love for Miss Tay Tay, too. She shared an Instagram photo of the two stars onstage with the caption, "Such a Pleasure to perform 'Complicated' tonight with @taylorswift on her #1989 world tour! She ROCKS."
Watch Avril and Taylor get their song on together, below.
Oh, and this isn't the only big surprise Taylor's had for concert fans lately. For her last show in Los Angeles, she invited Selena Gomez on stage with her. Watch their epic performance, here.