Popsugar Celebrity Billie Eilish Pictures of Billie Eilish and Finneas O'Connell Billie Eilish Pens Birthday Tribute to Brother Finneas O'Connell: "My Best Friend Forever" 1 August 2023 by Amanda Prahl View On One Page Photo 18 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 18 Previous Next Start Slideshow Billie Eilish