"Don't know how I am gonna play 2night but I am for AM," he Tweeted on Saturday, referring to a show he was set to play with his reunited band, Blink-182, at the Comcast Theater in Hartford, Conn. "My brother is gone. I love u and miss u, I'll never forget all the good times we had.
"I'll never forget everything we've been thru and every time I play the drums I'll think of you," he added in an additional Tweet.
The drummer and the DJ, whose real name was Adam Goldstein, had collaborated as the band TRV$DJ-AM. Together, they served as the house band at the 2008 Video Music Awards and released two volumes in a mixtape series called "Fix Your Face."
But that wasn't all the pair shared. In September 2008, they survived a fatal Learjet crash that claimed four lives, including two pilots and two of Travis' friends and employees. Both stars were badly burned following the crash and hospitalized.
"U were an amazing friend/DJ/human being," Travis continued to Tweet. "Rest In Peace my brother, this really f***s me up."
As previously reported on AccessHollywood.com, DJ AM was found dead in New York City on Friday. He was 36.
Related Content from AccessHollywood.com:
VIEW THE PHOTOS: DJ AM & Travis Barker
PLAY IT NOW: DJ AM On MTV Video Music Awards: It's A 'Big Movie Set Of Madness' (September 9, 2007)
PLAY IT NOW: 2008 MTV VMAs: Travis Barker and DJ AM