FOO FIGHTERS frontman Dave Grohl joined Billie Eilish onstage at her concert last night (Thursday, December 15) at the Kia Forum in Los Angeles

Taking a seat beside Eilish, Dave donned an acoustic guitar and praised Billie’s wearing of a shirt featuring late FOO FIGHTERS drummer Taylor Hawkins while performing on the Grammys earlier this year before the duo performed an acoustic duet of the FOO FIGHTERS song “My Hero“.

Dave recalled watching Eilish’s performance on the Grammys, saying: “The room was filled with real tears of love and gratitude.”

Taylor Hawkins was found dead in his hotel room in Colombia while on tour with FOO FIGHTERS. He was 50 years old.