Jan-Erik Kjesth was told by Gordon Stoker himself he did not play piano on 'All Shook Up' and when Hoyt Hawkins was suggested Gordon said "He may have played piano on 'All Shook Up' because that was me singing the duet with Elvis. I was singing directly across the mike, I was just on the other side of the mike from him".

As for Dudley Brooks comments about playing on the track, and that it was tried out more than one attempt, it's possible, as was the case of 'One Night Of Sin' and 'One Night'.

(above source = Elvis The Man & His Music # 71)

An estimation of how the movie version of 'Got A Lot O' Livin' To Do!' was spliced:-

Intro of L-2
First 2.5 seconds of record version (H2WB 0255-9)
First 6 seconds of record version (2.5 seconds repeated)
First verse and second chorus of record version
Third verse and fourth chorus of record version
Ending of D-17

The re-recording of 'I Believe' can found on the deluxe edition of the 2017 album Elvis: Christmas With The Royal Philharmonic Orchestra, which contained Elvis' original vocals but with new backings by The Royal Philharmonic Orchestra. The standard CD release of Elvis: Christmas With The Royal Philharmonic Orchestra did not contain this track.

In March of 2007, Sony decided to go through all of Elvis' masters. They retransferred everything and remastered all tracks including repairing as many clicks, pops, bad edits and dropouts as they could. They have used these newly mastered recordings on their new releases since 2007 including budget soundtracks, Legacy releases, the 30 disc Complete Elvis Presley Masters collection and the Franklin Mint package.