The event, starting Saturday, will be hosted by "Band From TV" formed by "Alias" actor Greg Grunberg and peopled by the likes of Hugh Laurie ("House"), Teri Hatcher ("Desperate Housewives") and Jesse Spencer ("House").
Following the Flex Rally, the "Band From TV" will perform at an exclusive red-carpet event at the finish line that will also feature a performance from Santogold, who also appears on new ads for the Flex vehicle.
--Karl Greenberg