Billie Eilish enjoyed a wild weekend with a star studded celebration as she turned 21 over the weekend.
But in true Billie style she rapped up her tour on stage just two days ahead of her big bash as she was brimming with excitement about the milestone event.
Following her stage show finale her showbiz friends including the likes of Avril Lavigne, Doja Cat, Hailey Bieber and Justin Bieber and Kendall Jenner rocked up at her West Hollywood hang out for a luxury festive celebration.
Billie was also joined by her boyfriend Jesse Rutherford, 31, who could not keep his hands off the pop star as they were spotted locking lips throughout the night.
Let's take a closer look at how she celebrated in style....
Did someone say shots?
Eilish shared a joke with fans on stage at her final Hometown Encore show and hugged her parents.
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Addressing the crowd she quipped: “Want to take shots? Give me two days,” Eilish joked. “I am 21 in two days, it’s f**king unbelievable.”
She was later joined by longtime collaborator Khalid (the duo wrote the hit “lovely” together) while Childish Gambino was given the stage for a rare performance.
Her Friday night performance was held at the Kia Forum in Ingelwood, California, where she was presented with a cake on stage by her family and new boyfriend Jesse Rutherford, 31.
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Hollywood hang out
But Friday was just the warm up act for the main birthday soiree on Saturday as the singer was joined by a host of celeb pals for a holiday-themed bash.
Hosted at luxury Hollywood hotel The Edition the event featured a giant sleigh as a focal point for the evening.
Elsewhere A-list stars posed in a photo booth with the likes of Avril Lavigne, Doja Cat, Hailey Bieber and Justin Bieber attending the do.
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Sexy Santa
Billie was in full-on festive attire for her posh party as she looked sensational in a sexy Mrs. Claus costume arriving to her bash in a bright red sled.
Once inside, the seven-time Grammy winner packed on the PDA with her 31-year-old beau Jesse Rutherford, who couldn't keep his hands off her as they shared passionate snogs on the dance floor before the group gathered to sing her Happy Birthday.
The DJ got the crowd of party-goers in the mood with rather vocal request as he told them to 'make some noise' after asking her friends and family to put their 'mother f**king hands in the sky for Billie'.
As the Oscar winner's guests sang to her, she raised one of her first legal drinks in the air, alongside some of Hollywood's biggest celebrities.
Olivia Rodrigo, Dove Cameron, Eiza Gonzalez, drummer Gethin Davies were spotted enjoying the no-expense spared set up.
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Kendall rocks
Kendall Jenner dazzled her 267 million Instagram followers with a collection of solo sepia images looking effortlessly gorgeous with her raven hair styled down in loose waves.
Jenner opted for a strapless number which let her Givenchy padlock necklace to shine.
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According to various online retailers, similar Givenchy padlock necklaces range anywhere from $900 to nearly $2,000, depending on the different elements used in the piece.
She was joined in the photo booth by Hailey Bieber as they got edgy in the photo booth as they playfully posed with middle fingers up.
Jenner, 27, and Bieber, 26, looked like they were having an absolute blast taking the black-and-white photos, which they both posted to their Instagram Stories.
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New flame
The singer has been forced to defend her relationship due to the 11 year age gap but Jesse appeared to share centre stage with his birthday girl, even coordinating a Santa themed outfit to match his 'Mrs' Claus.
Confirming their relationship she said: "Say what you need to say, but, like, I am in control right now. I did this.''
''I managed to get my way to a point in my life where I not only was known by a person that I thought was the hottest f**king f**ker alive, but pulled his a**! Are you kidding me? Can we just [get a] round of applause for me?' she marvelled.
Billie and Jesse made their red carpet debut at the star-studded 2022 LACMA Art+Film Gala.