Taylor Swift & Avril Lavigne perform together

Taylor Swift's squad just got more girl power!

During the 25-year-old singer's concert at PETCO Park in San Diego, California on Saturday, she brought up Canadian pop star Avril Lavigne onstage. The two performed the latter star's 2002 hit "Complicated."

We've been texting all week and we finally got to meet today and she's so cool," Swift told the crowd. "She's so sweet, which I love, when I find out that one of my favorite artists is also super amazing as a person."

She later tweeted that it was "incredible sharing the stage with" with Lavigne.

"'Complicated' is such a brilliant pop song and I just love her," Swift said.