“Every step of the way, I felt like I hit the jackpot on this,” declares two-time Oscar and 10-time Grammy-winning ...

It's been a rapid rise for Finneas, from writing music in his childhood ... "people showing up at your friend's house or your own house or chasing you down a street … That can be really intense." ...

In a clip premiering exclusively with PEOPLE on Wednesday, Dec. 18, Billie Eilish and brother Finneas O’Connell appear on the latest episode of Celebrity Substitute — and teach a class of first ...