After performing an unforgettable set at Radio 1's Big Weekend, Billie Eilish donned a balaclava ... And it was weird to be sitting in my green room eating chips and guac, seeing a huge crowd ...

Billie Eilish had plenty of reasons to be festive this holiday season. The “Birds of a Feather” singer turned 23 on Dec. 18, just days before Christmas, and compiled her week’s best moments ...

Billie Eilish and brother Finneas O'Connell paid a visit to an elementary school in Los Angeles and taught kids how to write songs on the latest episode of 'Celebrity Substitute.' ...