One can only imagine that if you're best friends with Lena Dunham you can certainly expect your birthday presents to be thoughtful, if not slightly eccentric. And that's exactly what Taylor Swift found out when Dunham presented her with a less than conventional, but still pretty fabulous, birthday gift!

Taylor Swift
Taylor Swift at the Z100's Jingle Ball in New York.

Read More: Taylor Swift Celebrates 25th Birthday In Style At NYC Jingle Ball.

28-year-old Dunham gave Swift a darling gold necklace which featured a pendant featuring a cameo of Swift's beloved cat Meredith. Swift took to Instagram to thank her friend and, added in the caption of the picture, "My birthday present from @lenadunham my new most cherished possession." 

Swift celebrated her 25th birthday on Saturday (13th December) but started celebrations for her birthday a day earlier. Swift performed on Friday (12 December) in New York at Z100's Jingle Ball but threw a star studded bash at her Tribeca apartment, according to Us Weekly

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

A photo posted by Taylor Swift (@taylorswift) on

Although Dunham did not attend the festivities, there were plenty of other A-list names on the list including: Jay-Z, Beyonce, Jaime King and her husband Kyle Newman, Selena Gomez, Nick Jonas, Sam Smith and Justin Timberlake. A whole host of others were also in attendance. The party appeared to be a relaxed affair with the group of friends posing for pictures in Christmas jumpers and Swift even keeping on her checked stage outfit. 

According to reports, the group enjoyed pizza, Japanese food and beer. The festivities went on until the early hours of the morning with Gomez staying over at her close friend's house until the next day. We just wonder what Meredith thought about all the noise...

Happy Birthday Taylor!

Read More: Taylor Swift Continues Reign At Number 1.

So this is being 25..... #WHAT #bestbirthdayEVER

A photo posted by Taylor Swift (@taylorswift) on