Bam Margera Not Going To 'Jackass: Best and Last' Premiere Despite Invite

The Hollywood premiere of "Jackass: Best and Last" is quickly approaching ... and TMZ has learned a surprising invite went out. Sources tell TMZ ... Bam Margera got a ticket to the big event for the final 'Jackass' film dropping next month ... but he's unable to make it because he's got a prior…