LOL! Lena Dunham truly knows her BFF Taylor Swift. The Girls star gifted the songstress with an epic necklace for her 25th birthday — a pendant featuring her beloved cat Meredith.

“My birthday present from @lenadunham my new most cherished possession,” the “Blank Space” singer shared on Instagram, along with a photo of the necklace showing off her sassy cat.

My birthday present from @lenadunham is my new most cherished possession.

Una foto publicada por Taylor Swift (@taylorswift) el

The treasured piece, which was designed by jeweler Irene Neuwirth, was just another highlight of her quarter-century birthday.

After performing at Z100’s Jingle Ball on Friday, Dec. 12, Swift celebrated her milestone with a star-studded bash at her Tribeca apartment with Beyonce, Jay Z, Justin Timberlake, Ansel Elgort, Sam Smith, Karlie Kloss, Kelly Osbourne, 5 Seconds of Summer, HAIM, Selena Gomez, Nick Jonas and Olivia Culpo, Charli XCX, Chrissy Teigen, Shawn Mendes, and Jaime King. A source tells Us that the crew enjoyed beers and a whole lot of food, including pizza and Japanese fare.

The fete turned into a girls’ sleepover as well. The insider adds that Gomez stayed the night while others didn’t take off until early in the morning.

“So this is being 25…#WHAT #bestbirthdayEVER,” Swift captioned a seriously amazing group shot of the crew.