Billie Eilish's parents considered sending their daughter to therapy because of her "intense" obsession with Justin Bieber.
The 18-year-old singer has previously spoken of her devotion to the Baby singer and described how her bedroom wall was adorned with his posters.
In a recent episode of Eilish's Apple Music radio show me & dad radio, the chart-topper and her father, Patrick, welcomed Eilish's mother, Maggie Baird, as a special guest.
During the interview, her mum revealed how extreme her daughter's passion was, saying she would cry while listening to his music.
"I just want to say, we did consider taking you to therapy because you were in so much pain over Justin Bieber.
"It was so intense, it caused you so much pain."
Eilish said she would become emotional while watching Bieber's music video for his 2012 hit As Long As You Love Me.
"I would watch the music video for this song and just sob," the Grammy winner said.
Discussing the song, Baird, an actress whose TV credits include Bones, The X-Files and Six Feet Under, added: "I remember this one really well and the video, and Billie talking about it, and being excited it was coming out, and just crying and crying.
"Everyone knows the whole Billie/Justin Bieber thing, but this song was a big part of it."
Eilish got to meet 26-year-old Bieber for the first time at Coachella last year. The pair were pictured sharing a hug following Eilish's lauded debut performance at the festival.