Ariana Grande looked nearly unrecognizable as she transformed into an elderly woman for her latest short film 'Brighter Days ...

Billie Eilish got on with Ariana Grande like a house on fire after a recent public appearance -- and now they’re hanging out plenty and bonding over careers, fashion, romance and everything in between ...

“This is a childhood dream come true for Billie,” the source spills. “She’s been the biggest Ariana Grande stan since she was a kid, so it’s just wild to her that they’re now actual friend ...