At Tuesday night’s "Celebrating David Bowie" show at the Wiltern in Los Angeles, where the massive band was comprised largely of alumni of Bowie’s touring units, the players were the stars. Up to a point, anyway -- that point being the five-pointed Blackstar, one of two songs from Bowie’s swan song sung by Sting, who helped turn the evening from a very efficient tribute concert into something more spellbinding and incantatory.,,