“The ‘Army of the Dead’ Soundtrack Is Consistently Perfect” notes Anna Menta in Decider:
“Each song seems to capture the grizzled but colorful vibe of killing zombies in the desert—like a western that knows how to have fun.
Director Zack Snyder doesn’t waste time before getting the first—and best—needle-drop of the film, aka Elvis’s 'Viva Las Vegas,' performed by Richard Cheese & Allison Crowe. The cover is a jazzy, big band Broadway number, complete with trumpets and trombone. It adds the perfect splash of humor to the film’s stylish credit sequence…”
https://decider.com/2021/05/24/army-of-the-dead-soundtrack-netflix-cover-singer/