On Friday, Madonna posited haunting cover of Britney Spears' 2003 hit "Toxic" to social media in honor of World AIDS Day and Spears' 36th birthday.

Madonna Supports Britney Spears amid Conservatorship Battle: 'Give This Woman Her Life Back' "This is a violation of human rights! Britney, we coming to get you out of jail!" ...

In honor of World AIDS Day on Dec. 1, Madonna covered Britney Spears' "Toxic" on Instagram. She dedicated the song to both the cause and to Spears, since her birthday happens to be on Dec. 2.

Britney Spears paid tribute to Beyoncé and Madonna in a multiple-image Instagram post Wednesday. Isn't it great we can do that now? She captioned the images of the two icons: "@madonna and ...

Paging pop royalty! When it comes to epic dance bops, Madonna and Britney Spears are the undisputed queen and princess of pop ...

In this photo, Britney Spears and Madonna are seen performing at the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003, in New York City, New York.

Pop stars Britney Spears, left, and Madonna pose backstage during the 2003 MTV Video Music Awards in New York City. (Frank Micelotta / Getty Images) By Christi Carras Staff Writer .

After Britney Spears and Madonna reenacted their infamous VMAs kiss during the “I’m a Slave 4 U” singer’s wedding to Sam Asghari on Thursday, we look back on their five best BFF moments.

Another glimpse of Madonna’s look at Britney Spears’ wedding. (PRJ / BACKGRID) Over the years, Madonna has maintained her support for Britney as she weathered a 13-year-long conservatorship.

Britney Spears reflects on her mentorship with Madonna and their kiss at the 2023 MTV VMAs and "Me Against the Music" collaboration in her memoir 'The Woman in Me.' ...

Spears shared a kiss with Madonna at her ill-fated wedding to Sam Asghari in June 2022. Kevin Ostajewski/Shutterstock “Madonna originally wanted Britney to join her on tour this year,” a ...

Madonna responded, “I am gagging to work with Britney again.” (“Gagging to,” by the way, is apparently an actual expression . Basically, Madonna really wants to collaborate.) ...