Travis Barker is on the mend. The 46-year-old musician gave a surprise performance at pal Machine Gun Kelly's «Mainstream Sellout» show at The Forum in Los Angeles on Wednesday night, marking his first on-stage appearance since being hospitalized for pancreatitis last month. «There's a person I grew up idolizing that I became friends with and he believed in me,» MGK told the crowd. «And never more have I wanted to jam to a song that he and I created.
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