In this Fresh Air interview, siblings and musical partners Billie Eilish and Finneas O'Connell share insights into their journey in music. They delve into their evolution as artists and their distinctive approach to songwriting, while Billie reflects on the challenges of being a teenage star and the intricacies of their sibling bond under the spotlight. Finneas talks about his solo career and how their collaboration has developed over time. Billie candidly discusses her insecurities and struggles with body image, revealing the emotional depth behind her lyrics and her strong connection with her young fanbase.