And the single right answer is...?

I want to say 'Elvis' lets seeThe name of Tom Mix horse. -- Pianist?
The name of the RCA Dog who is waiting for his Master's Voice. October 28, 1957 show
42 age at death
What a Church Key is. I struggled here. If its off the wall then there may be some gospel / music reference. But I dunno.
That ALL beer is brewed cold. ?
Big Momma Thornton. hound dog
Who's on first? Costello
That "Frankie & Johnny were lovers" is not about a same sex marriage. erm a bit on the nose this one
That it's always 5 o'clock somewhere. ?
That you can tune a piano but you can't tuna fish. ?
Why there was a baby face on the bottle. Since my baby left me....
Mississippi John Hurt. Influence? Cover
When the Cuyahoga River caught fire. Return of Elvis
A B-9 Class M-3 General Utility Non-Theorizing Environmental Control Robot said ...? Elvis Kim?
Fulda Gap. Training grounds
Hof Corridor. A certain hall?
Formosan Strait. Dining?
Quemoy & Matsu.
Bikini Atoll. Whole Lotta Shakin' Goin' On?
Widdershins. Perkins?not enough that I'm convinced, a little too much stretching involved. I could probably do an equally poor job with 'World War' as an answer. Edited by Modulous, : No reason given.

the clues all point to a singular answer. My best guess was 'Elvis'. Yeah, I was trying to tie Church Key to Elvis. That's the struggle.