Travis Barker has taken to Twitter to express his grief over the death of his good friend, DJ AM.

“Rest in Peace my brother,” the Blink-182 frontman wrote.  “I’ll never forget everything we’ve been thru and every time I play the drums I’ll think of you.  U were an amazing friend/DJ/human being.”

Barker and AM were out on a mini tour last September when their charter jet crashed, injuring both men and killing four others.

Travis joined countless other celebrities in sharing their thoughts via Twitter.