She wore a tailored black jacket atop an untucked white button-up shirt, black slacks and matching dress shoes.

Two of the evening top-billed acts, Billie Eilish and Green Day, decided to sneak in an onstage duet. As the band geared up ...

Green Day kicked off FireAid ... Idiot deep cut “Last Night on Earth” and welcomed special guest Billie Eilish to perform onstage with them. “I’m here to honor you,” they sang ...

Billie Eilish and the red ... wore an oversize V-neck jacket with a white button-down shirt peeking out, which she teamed with wide-leg black trousers. Eilish also added small black Chrome Hearts ...

At the latter, the night is starting off strong with Billie Eilish joining Green Day for 21st Century Breakdown’s “Last Night On Earth.” Eilish walked onstage partway through the song.