It’s pretty cool when a band you like covers a song you like. It’s hit-or-miss though. I couldn’t wait for Foo Fighters “Baker Street”, but it sounded too much like the original.
And t.A.T.u’s “How Soon Is Now” is essentially a crime against humanity.
So, what song are you dying to hear, covered by which artist? I’ll start this party:
Al Stewart’s “Year Of The Cat”, done by Tori Amos. Ideas?
Seether’s “Careless Whisper” was freaking amazing!
Bad Wolves cover of The Cranberries hit - “Zombie”.
Prince covering “Creep”, originally by Radiohead. Holy moly. Prince has got to be one of my favorite performers of all time. Definitely one of my favorite guitar players. The level of skill and confidence. The guy could just make you cry with his guitar solos. Video quality gets better as it goes. Intro is kinda long, skip to 1:20…video quality is better shortly thereafter, starts kinda bad. And yeah, stick around for the guitar solos (plural).
I’m going to sound like an old lady nerd. However, Whitney Houston remaking Dolly Parton’s “I’ll Always Love You” was the tits!!!
I love sound of silence by disturbed, but I feel like you were asking for a non existent remake. I would love radioactive by queen including Freddie, but that ain’t gone happen. It would likely be odd, but surprisingly good
Gotta mention Johnny Cash covering Hurt from nine inch nails.
You’re right! Everybody got good shout-outs so far, but I was looking for theoretical cover songs. P.S. “Hurt” totally goes wlith Cash’s voice!
Sound of silence was the first one that came to mind. So much anguish 
I missed the theoretical part, whoops.
Well, since I went with a cover that Prince did do the first time, here’s one I would’ve loved to have heard him do – Peter Gabriel “Sledgehammer”. Prince would kill that one.
Too many to pick from. Here is what it is at the moment.
Thought of a cover that doesn’t exist. Greatest Gig in the Sky sung by Freddie Mercury
Epic: “Under Pressure”, done by Foo Fighters with Prince! 
Also epic? “Baby Got Back”, by Sir Patrick Stewart. 
I thought of another great cover done by William Shatner - Common people
Chris Cornell doing Micheal Jackson’s “Billie Jean”.