Elvis Presley’s output was 68 RCA albums between 1956 and 1977, plus 12 cheapie compilations under the Pickwick/Camden label.
He averaged 3 albums a year, and about a third of that was soundtracks in the 1960s.
Col Parker’s logic was that a movie replaced Elvis touring and a soundtrack met the contractual obligations for Elvis.
Except soundtracks are the movie and not the movie’s stars. So they shouldn’t have counted as “Elvis” Albums – some movies had duets and Elvis would re-record them solo for the albums.
Paradise Hawaiian Style’s Queenie Wahinna Papaya song is cute as the Elvis – kid duet but non-sensical for just Elvis.
Nancy Sinatra and Ann-Margaret both did duets and solo songs in the Elvis picture, but only Nancy made the soundtrack. We had to wait until the 1980s to get the Elvis/Ann-Margaret duets on official releases.
Elvis did two movies with singer Shelly Fabre and she didn’t sing in either.
Speedway was the last “Presley Picture” in terms of the Elvis formula
Elvis races cars and chases girls with a sleazy manager sidekick played by Bill Bixby. Elvis; rival from Clambake – racing boats in that one.
This was the only soundtrack to include the movie duets and the Nancy Sinatra song.