During the Madrid stop of her GUTS world tour on June 20, 2024, Olivia Rodrigo let the audience in attendance in on the secret genesis of her song “Happier,” off her debut solo album SOUR.

Stefanie Keenan/Getty Olivia Rodrigo is “happier than ever” to hear that Billie Eilish wrote a song with her in mind. Not long after Eilish, 21, revealed in an interview with The Los Angeles ...