At the Billie Eilish concert in California, Charli xcx made a guest appearance. It's not the first time the artists have celebrated birthdays together. Billie Eilish turned 23 on December 18th.

Billie Eilish helps inaugurate Billboard's new Hot Dance/Pop Songs chart with her first top 10 on the tally, "Guess" with ...

Billie Eilish's latest concert got the Brat treatment. On Tuesday, Dec. 17, Charli xcx made a surprise appearance at the "Birds of a Feather" hitmaker's Los Angeles concert at the Kia Forum.

On Tuesday, Charli XCX celebrated the end of her monumental ... Charli also included a photo with Billie Eilish from their panty party music video for the remix of “Guess.” ...

Credit: Terrance O'Connor As well as achieving huge success with her own album, Hit Me Hard And Soft, Billie Eilish also scored a big hit this year with her guest spot on the remix of Charli XCX ...

Charli XCX may have dominated this year but there were a whole load of blockbuster records following in its wake ...

Charli XCX isn’t your typical pop star ... the songwriting savant finally got her due this summer (IYKYK). Billie Eilish builds on “Happier Than Ever” with “Hit Me Hard and Soft.” ...

Charli XCX is all set to headline an exciting A24 picture! The Cinemaholic can reveal that the celebrated singer-songwriter ...

Have plans to catch the 2025 Grammys? We've answered all your questions, including what time they're on and where you can ...

Ariana Grande earns her first top 10 smash on Billboard's new Hot Dance/Pop Songs chart as “Sympathy is a Knife” with Charli ...

As well as achieving huge success with her own album, Hit Me Hard And Soft, Billie Eilish also scored a big hit this year with her guest spot on the remix of Charli XCX’s Guess. However, based on her ...