Michele Amabile Angermiller “American Idol” top four finalist Casey Bishop made a bold move Sunday night, sitting down with mentor Finneas to take on Billie Eilish’s “Wish You Were Gay.” She rocked the song’s co-writer/producer, and the judges, too — yet, despite all that love, apparently not everyone wished she would stay.“So, you’re singing my sister’s song,” Finneas said to the 16-year-old Estero, Florida native about the track.