Billie Eilish’s Family, Boyfriend Jesse Rutherford Celebrate Star’s 21st Birthday During LA Show

Billie Eilish might sing about “when the party’s over,” but this weekend theparty was just getting started!

The music superstar was joined by her family and boyfriend Jesse Rutherford onstage at Inglewood, California’s Kia Forum Friday — when they surprised herwith a cake at her final of three “Hometown Encore” shows ahead of her 21stbirthday on Sunday.

With her family by her side, and fans singing along, Eilish blew out hercandles to the applause of the crowd, before giving her folks a hug.

“Want to take shots? Give me two days,” Eilish joked with concert attendeesafter her family, including brother Finneas, left the stage. “I am 21 in twodays, it’s f— unbelievable.”

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Billie Eilish attends the 2022 Vanity Fair Oscar Party hosted by RadhikaJones at Wallis Annenberg Center for the Performing Arts on March 27, 2022 inBeverly Hills,CaliforniaBillieEilish attends the 2022 Vanity Fair Oscar Party hosted by Radhika Jones atWallis Annenberg Center for the Performing Arts on March 27, 2022 in BeverlyHills,California

Billie Eilish attends the 2022 Vanity Fair Oscar Party hosted by Radhika Jonesat Wallis Annenberg Center for the Performing Arts on March 27, 2022 inBeverly Hills, California

Lionel Hahn/Getty

RELATED: Billie Eilish Says She Was Surprised When People InitiallyCalled Her Music ‘Depressing’ and ‘Sad’

The show later saw Eilish joined on stage by Donald Glover — aka ChildishGambino — and her longtime collaborator, Khalid. With Glover, 39, Eilish letthe artist take center stage for a full performance of his 2016 hit “Redbone,”before he asked the crowd to wish her a happy birthday.

During a 2019 interview, Eilish revealed that Gambino “created” her. “That’s aGod,” she said at the time. “You can’t even put him on a list with otherpeople.”

Eilish also shared a performance with Khalid, 24, of their collab “Lovely”during his stint on stage, before he ran through his solo smash “Location.”

The star later got into the holiday spirit and performed a rendition of “HaveYourself A Merry Little Christmas” — which she did earlier in the week aswell.

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During Thursday’s show at the Forum just a day before, Eilish surprised herfans with guest appearances by Dave Grohl and Phoebe Bridgers. With Grohl, 53,she sang a cover of the Foo Fighters’ 1998 hit “My Hero.”

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“You know, I have to say, earlier this year, all of Foo Fighters’ familiesgathered together at my house to watch the Grammys, and when Billie came outfor her performance in the Taylor Hawkins T-shirt, the room was filled withreal tears of love and gratitude,” Grohl said at the show.

He added: “So from our families, who are here tonight, the Hawkins family, andeveryone, we’d like to thank you very much for that. So let’s sing it forTaylor. This song’s called ‘My Hero.’ “

With Bridgers, 28, Eilish duetted on her 2017 track “Motion Sickness,” whereEilish handled harmonies along with the second verse.

RELATED: Finneas Reacts to Sister Billie Eilish ‘s Relationship withBoyfriend Jesse Rutherford: ‘I’m Happy’

Billie Eilish talks BF Jesse Rutherford for firsttimeBillieEilish talks BF Jesse Rutherford for firsttime

Billie Eilish talks BF Jesse Rutherford for first time

Axelle/Bauer-Griffin/FilmMagic

And while Eilish was joined on stage by her new boyfriend Rutherford, 31, itwasn’t the first time the pair appeared with each other publicly.

The couple previously made their red carpet debut in a Gucci blanket back inNovember during the LACMA Art + Film Gala 2022.

As part of her latest Vanity Fair interview, titled “Same Interview, SixthYear,” the pop star opened up about dating The Neighborhood vocalist. “It’sreally cool and I’m really excited and I’m really happy about it,” Eilish saidof her relationship.

“I managed to get … to a point in my life … where I not only was known by aperson that I thought was the hottest f—ing f—er alive, but pulled his ass!Are you kidding me? Can we just [get a] round of applause for me?” she added.”Thank you, Jesse Rutherford, everyone.”