Yes, it is the David Nail version...Sounds exactly like him...Van Morrison's song is different...This "Someone Like You" (the Adele song) was co-written by Dan Wilson of Semisonic (You've heard their song "Closing Time" on Kroger radio, right?), so I thought it was Dan's own version at first.
I'll give you one more earworm...Joel Mercado sings a song called "Superman's Outta Town" that they play incessantly at my store..."Who's gonna save you when Superman's outta town...Who's gonna save you when I'm not around..."
I often think about that line on my days off...
At least I appreciate the 80's stuff they've been playing recently at my store...I've heard The Clash ("London Calling"), The Cure ("In Between Dreams"), and Echo & The Bunnymen ("Lips Like Sugar") recently, so it's not ALL bad...