Kendall Jenner and Hailey Bieber attend Billie Eilish’s festive-themed 21st birthday bash

Billie Eilish has given fans a glimpse into her epic-looking 21st birthday celebrations.

The Bad Guy singer marked the milestone by throwing a massive bash at swanky West Hollywood hotel The Edition on Saturday and shared an inside look on TikTok.

From the snippets, the birthday girl can be seen dressed in a sexy Mrs Claus outfit consisting of a faux fur-trimmed minidress, matching elbow-length gloves, a black belt and large silver hoop earrings.

The festive theme continued as she arrived in a bright red sled, alongside a friend holding a champagne flute.

Despite her former celebrity crush Justin Bieber being present with his model wife Hailey Bieber, she only had eyes for new boyfriend Jesse Rutherford, 31.

The couple looked totally loved-up, with the lead singer of the rock band The Neighbourhood sporting a Santa outfit which co-ordinated perfectly with Eilish’s.

Also in attendance were Kim Kardashian’s younger sister Kendall Jenner, Olivia Rodrigo, punk pop princess Avril Lavigne, former Disney child star Dove Cameron, Eiza Gonzalez, drummer Gethin Davies and more.

Getting spirits high was a DJ who asked her friends and family to put their “mother f**king hands in the sky for Billie” and “make some noise”.

Elish looked thrilled as her friends sang Happy Birthday to her while a beautiful two-tier cake was brought out topped with red and white candy, and a plethora of lit candles ready for her to blow out and make a wish.

In acknowledgement, the seven-time Grammy winner held up a glass symbolising her first legal drink – unlike the UK, you have to be 21 to drink in the US.