Travis Barker -- 'Rest in Peace My Brother'

Travis Barker has taken to Twitter to mourn the loss of his close friend DJ AM -- in bursts of 140 characters or less.

Barker wrote: "Don't know how i am gonna play 2night but i am for AM. My brother is gone.i love u and miss u, i'll never forget all the good times we had.

Followed shortly by: "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."

And lastly: "Rest In Peace my brother, this really f**ks me up."