Billie Eilish's mother thanks Justin Bieber for making her daughter's 'dream come true' Billie Eilish's mother Maggie Baird has thanked pop star Justin Bieber for making her daughter's dream come true by serenading her on stage at the Coachella festival in California on Saturday night (1 20 April 2026 Billie Eilish's mother Maggie Baird has thanked Justin Bieber for making her daughter's "dream come true" by serenading her on stage at Coachella.