Katy Perry had the best day “catching up” with Taylor Swift backstage at the Eras Tour last year.

Dave Matthews and John Mayer (appearing together), Earth Wind & Fire, Gracie Abrams, Green Day, Gwen Stefani, Jelly Roll, Joni Mitchell, Katy Perry, Lady Gaga, Lil Baby, P!nk, Red Hot Chili ...

According to Glamour, the conflict began when three of Perry's backup dancers from her "California Dreams" tour joined Swift's "Red" tour but then left prematurely to join Perry on her "Prismatic" tour. This caused the feud to begin.

The two-venue, FireAid Benefit Concert, was held in Los Angeles on Thursday night to help raise money for the Southern California communities affected by the devastating fires that ignited earlier this month.

Follow live updates on the FireAid benefit concert, which will feature performances from Billie Eilish, Lady Gaga and more, as they raise money for Los Angeles-area wildfire victims.

The Red Hot Chili Peppers wrapped up the Kia Forum portion of FireAid benefit concert with a medley of hits. Get the details here.

Follow live updates on the FireAid benefit concert, which will feature performances from Billie Eilish, Lady Gaga and more, as they raise money for Los Angeles-area wildfire victims.

FireAid in Los Angeles inspired a community devastated by wildfires. We take you inside the benefit shows with Lady Gaga, Olivia Rodrigo and more.

The FireAid benefit concert on Thursday in Inglewood, California, features major artists raising funds for wildfire relief.

American Idol alum Katy Perry shared her thoughts on past winner Carrie Underwood replacing her as judge on the singing competition series, which airs March 9 on ABC.

Proceeds raised by the FireAid benefit concert will help those affected by the wildfires by raising money "for rebuilding communities devastated by wildfires and supporting efforts to prevent future fire disasters throughout Southern California," according to a press release.

Dave Matthews Band will no longer be performing at the FireAid benefit concert on Thursday. The band posted on its Instagram page that that they were not able to attend due to a “critical illness in the family.