For a detailed breakdown of Eilish’s exact pieces, the Instagram account @eilishoutfits tracks each tour look and how much it ...

At one point the blonde lady rested her head and hands on Eilish's back. Billie was nicely made up ... The blonde woman had on a black tank top with her maroon bra straps showing.

Billie Eilish got on with Ariana Grande like a house on fire after a recent public appearance -- and now they’re hanging out ...