Who was singing during the Vegas event isnt really relevant, that's like the cornerstone of the whole Q phenomenon. The "Q Clearance Patriot" post that started it all alleged the entire shooting was actually a hit taking place on a Saudi Prince at the Mandalay Bay, and he narrowly escaped with his life. So that means hitting all the people in the street below was not part of the plan, it was either collateral damage during live-fire hostilities or revenge killing when the hit went wrong. Some kind of mass casualty distraction to smoke screen the whole night--which likely doesnt happen if the hit team had gotten their man.