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

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

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She enjoyed her birthday party with her boyfriend Jesse Rutherford.

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

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

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

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

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

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

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

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