This performance is "Everything I Wanted ... RELATED VIDEO: Billie Eilish Reveals She Got Her First Tattoo This Year — 'But You Won't Ever See It' "Congrats. How are you feeling?" ...

The singer, 34, was performing the Nashville emo outfit's 2009 track "All I Wanted," when she revealed Billie Eilish ... “Happier Than Ever" during her headlining set. Eilish isn't the first ...