Credit:- Google/Billie Eilish

Billie Eilish celebrated her 21st birthday on 18 Dec 2022.

Credit:- Google/Billie Eilish

Billie Eilish got into the festive spirit as she slipped into a sexy Mrs. Claus costume.

Credit:- Google/Billie Eilish

She enjoyed her birthday party with her boyfriend Jesse Rutherford.

Credit:- Google/Billie Eilish

Her former celebrity crush Justin Bieber and his wife was also appeared in the party.

Credit:- Google/Billie Eilish

The Bad Guy singer looked blissful as she arrived to at The Edition in West Hollywood.

Credit:- Google/Billie Eilish

The seven-time Grammy winner packed on the PDA with her 31-year-old beau.

Credit:- Google/Billie Eilish

As the crowd sang and presented her with a beautiful birthday cake.

Credit:- Google/Billie Eilish

Rutherford rocked a seasonal Santa suit, which coordinated with Mrs. Claus outfit.

Credit:- Google/Billie Eilish

She appeared in matching elbow-length gloves, a black belt and large silver hoop earrings.

Credit:- Google/Billie Eilish

They were recently slammed over their 'disturbing' baby and old man Halloween costumes.