'Shazam!' Star Zachary Levi Shows Off Sweet Pipes at NYC Bar

[[tmz:video id="1_8nbtit8y"]] Zachary Levi -- the superhero in the new DC Comics flick "Shazam!" -- ought to add an 8th superhuman strength to his arsenal ... superb singing!!! We got video of Zachary out at a bar Wednesday night around 11 PM in NYC's…