A week after Billie Eilish joined Justin Bieber on stage during his nostalgic “One Less Lonely Girl” Coachella performance, ...

The 34-time Grammy nominee joined Bieber on stage at Coachella while he sang 'One Less Lonely Girl' ...

The "Birds of a Feather" artist recalls being "a Bieber girl in a Bieber world." ...

Billie Eilish’s never-before-seen Justin Bieber fangirl throwbacks had fans stunned after her Coachella moment.

Bieber invited the self-proclaimed 'Belieber' to join him midway through his 2009 hit "One Less Lonely Girl" ...

"Don't talk to me." she captioned the social post.

The resurfaced clip arrives days after Eilish was serenaded with "One Less Lonely Girl" by her childhood idol at Coachella.

Bieber brought Eilish on stage during his Weekend Two set, as he serenaded her with the pop hit off his 2009 My World EP ...

Pop sensation Billie Eilish experienced a deeply emotional moment at Coachella, joining her childhood idol Justin Bieber on ...

Sexyy Red, Big Sean, and Dijon also stop by during singer's Weekend Two headlining gig ...

Seen in videos online from Coachella, Billie Eilish was encouraged by Justin Bieber’s wife, Hailey Bieber, to go on stage for ...