Aesthetics-wise, it doesn't get more different than Ariana Grande and Billie Eilish ... princess persona for a boxy suit that easily could have been plucked from Eilish's famously androgynous ...

Recording Academy darling Billie ... stunning Gucci suits. "It's a really scary time and LA is my favorite place in the world and my only home and I care about it so much," Eilish said.

Kevin Mazur/Getty Billie Eilish and ... Matt Winkelmeyer/Getty Eilish was also joined on the red carpet by her brother and collaborator, Finneas, who wore a brown suit and button-down shirt ...