Billie Eilish celebrates 20th birthday with Christmas themed cake

Billie Eilish left her teens behind her on the Dec. 18, 2021, the seven-time Grammys winner shared an image on Sunday of her birthday cake, which was Christmas themed.

"20??" she simply captioned the post which included three pictures from her birthday celebration. The first image showed Billie Eilish's white cream two-tier birthday cake adorned with candy canes and red and white sprinkles. The cake of course included 20 multi-colored candles to honor the songstress's momentous birthday.

Despite being now all grown up, Billie Eilish showed fans she's still a kid at heart with a bouncy castle in her backyard which was decorated with lit-up fairy lights. The Happier Than Ever singer shared two images from within her bouncy castle, with one including her feet crossed in the corner as she relaxed. Check out the post below!

Of course, the post gathered thousands of comments from friends and fans wishing the super-star a "Happy Birthday". The post currently has over 6 million likes, and still rising!