The Spanish summer heat is sizzling — so much so, Billie Eilish and her crew said screw it, stripping down for a bold, moonlit plunge into the Mediterranean Sea!

Catch the pics and vids — Billie, bikini-clad and living her best life, hit the beach in Barcelona with her friends, clearly on a mission to make it a night to remember.

Billie was just like any beach babe on vacay — jumping waves, splashing around, and soaking up the moment before toweling off with the gang.

A well-earned breather for Billie — who’s smack in the middle of her ‘Hit Me Hard and Soft’ tour grind.