Los Angeles, California - Billie Eilish dropped more snaps from her epic birthday bash, effectively making everyone jealous that they weren't at the festive occasion.

The 21-year-old music artist is giving fans more glances at what appeared to be an off-the-walls birthday party.

The Happier Than Ever singer celebrated her special milestone on December 18, and several A-listers were spotted helping Billie commemorate her 21st trip around the sun.

From Justin Bieber and his wife Hailey to Lil Nas X, Ms. Eilish had quite the guest list.

Selena Gomez Benny Blanco shares sweet new peek at Selena Gomez proposal!

On Thursday, she continued the fun by dropping more snaps on Instagram from the holiday-themed extravaganza.

Since the pop singer was born before Christmas, it was only fitting that she donned a red and white off-the-shoulder Santa-inspired dress, long gloves and candy cane earrings, which were all on full display in her newly uploaded pics.

In the carousel post, Eilish is seen grinning alongside her boyfriend Jesse Rutherford as the two posed in front of massive gold balloons that read, "Happy 21st Birthday."

Another snap showed the couple in a photo booth with Mr. and Mrs. Bieber, though Rutherford's face is hardly seen in the photo.

All in all, it looks like Billie had one heck of a 21st birthday!