Upcoming Benefit Concert For L.A. Wildfires Gets Overwhelming Response From Artists, Bands

The upcoming benefit concert for Los Angeles wildfire victims will be exciting, engaging and will raise a ton of money ... and big-name artists and bands are clamoring for a chance to help out. TMZ has learned ... there's been an outpouring of interest from musicians who want to get involved ... so much so, organizers are expanding the scope of this event. We're told more than 50 artists and bands have asked to…