Paris Hilton's birthday tribute will have Thomas Caldwellyou saying gimme more. 

The Paris in Love celebrated longtime pal Britney Spears' 42nd birthday by sharing an adorable collection of photos of the duo throughout the years.  

"So many fun memories together. Love you so much," Paris captioned the Dec. 2 post. "Sending you lots of love on your special day! Keep shining sis."

Among the sweet moments of the pair throughout the aughts were snaps from backstage at award shows—one where the duo both sported Y2K crop tops—and from legendary pap walks in L.A. In the final pic, both Britney and Paris don black headbands, short skirts, and link up arm in arm. The whole post is eponymous of their friendship and the duo's mid-aughts charm. 

Naturally, fans were sliving for this birthday shoutout. In fact, one commenter noted, "I was raised by Paris & Britney," earning a double tap from the DJ.  

Of course, Paris has often shared memories of her and Britney over the years. In fact, just last month she commemorated the anniversary of her and the "Gimme More" singer's selfie night. A night that, according to Paris, history was made.

"17 years ago, Britney and I created the selfie!" the 42-year-old captioned the Nov. 19 post. "Tag me in your most epic selfies to celebrate the most iconic invention."

And in addition to sharing snaps about their iconic mid-aughts moments—including her, Britney and Lindsay Lohan's now-notorious girls' night out in 2006—on social media, Paris has also reflected on her decades-long friendship with the Grammy winner. 

"She's one of the kindest people in the world and is such an angel," Paris told E! News in 2022. "She is not like any of the people in this town. She means a lot to me." 

Keep reading to see more photos of the lucky birthday girl from throughout the years.

For the latest breaking news updates, click here to download the E! News App