Billie Eilish is publicly addressing speculation that she and brother Finneas had a "falling out." "I heard somebody say, 'Did you guys hear Finneas and Billie had a falling-out?'" Eilish, 24, told Elle in a joint interview with her sibling and collaborator, 28, published on Tuesday, April 28. "Finneas and I have never and will never have a falling-out, ever in our lives," she continued. "We'll get in the biggest f***ing fight you've ever heard of in your life, and five minutes later, we're back, laughing and making music. It's sibling s***.