DJ AM and Travis Barker DJ AM and Travis Barker

When Travis Barker opened up about the death of DJ AM, a musical collaborator and fellow survivor of a 2008 plane crash, the Blink-182 drummer wasn't sure how he'd be able to perform.

"Don't know how I am gonna play 2night but I am for AM," Barker tweeted Saturday night before the band's concert in Hartford, Conn. "My brother is gone. I love u and miss u, I'll never forget all the good times we had."

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Barker and his band did take the stage, but it wasn't an easy performance, according to People. "This night is really hard for us on stage," bassist

Mark Hoppus said during the concert. "We lost a dear friend yesterday. His name was Adam Goldstein. You probably know him as DJ AM. He was an innovator and a genius and he loved music more than anything else. Above all he was a dear friend."Goldstein (DJ AM's real name) was found dead in his New York City apartment Friday. An autopsy was performed, but an official cause of death is inconclusive, pending additional toxicology and tissue tests, which could take several weeks.

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Barker, Hoppus and guitarist Tom DeLonge all had tears in their eyes when they played "Down" as a tribute to Goldstein. The band also observed a moment of silence for their friend.Though his bandmates joked at other points in the show, Barker remained silent and stoic. At one point he rubbed his eyes and held his head in his hands. Hoppus returned to the stage after the show to thank the fans."Thank you very much," Hoppus said. "Although today is one of the hardest days in our entire lives, we wouldn't want to spend it anywhere else. Thank you for all of your support."