Photo:Kevin Ostajewski/Courtesy of 11:11 Media; getty

Paris Hilton Says She’s ‘So Proud’ of Britney Spears for ‘Telling Her Story’ in New Memoir

Kevin Ostajewski/Courtesy of 11:11 Media; getty

Paris Hiltonis celebratingBritney Spearson her 42nd birthday!

The businesswoman, 42, paid tribute to the singer with apost shared on InstagramSaturday marking the special occasion.

“Happy Birthday @BritneySpears 👑,” Hilton began the caption of her post. “So many fun memories together👯‍♀️.”

Alongside her sweet message, Hilton also shared a series of photographs of herself and Britney from throughout the years, including images from nights out on the town, as well as shots from behind the scenes at awards shows.Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories.

TV Personality Paris Hilton and Singer Britney Spears at the 2008 MTV Video Music Awards at Paramount Pictures Studios on September 7, 2008 in Los Angeles, California.

Chris Polk/FilmMagic

Hilton and Britney have been friends for years and have long supported each other publicly.

Ahead of the release of the “Stronger” singer’s memoir,The Woman in Me,Hiltontold PEOPLEshe was “so proud” of Britney “for telling her story.”

“I know how hard it can bedoing a memoirbecause you have to really dive in and think about so many moments in your life that I’m sure you don’t even want to think about,” she explained. “But it is truly such a healing experience, and writing my book, [Paris: The Memoir], has changed my life in so many ways,”

Added Hilton: “I’m really hoping that she feels the same way with this. I am just proud of what a strong woman she is.”

Paris Hilton and Britney Spears out together in Los Angeles in 2006.SplashNews.com

Paris Hilton Celebrates Britney Spears' Birthday

SplashNews.com

“Being together and celebrating her birthday was a really nice moment for the family," a source said.

In anInstagram postat the time, Britney revealed that her mom had recently visited her house for the first time in years.

source: people.com