All tracks on Celluloid Rock have channels reversed to the same tracks on the Memory release Elvis Sings Girls! Girls! Girls!, with Elvis' vocals in either the left or right channel. A better stereo image with Elvis' vocal centred, is presented on the same tracks on FTD's Girls! Girls! Girls! extended soundtrack, Double Features - Kid Galahad / Girls! Girls! Girls! and Out In Hollywood.

The acetate of 'Where Do You Come From' is spliced from Take 13, and has the count-in for Take 13 ("One-Three"), but the line "From some di-stant star..." (0:37) has been replaced with the same line from Take 14. This would indicate that Take 13 was initially to be used as the master, with a vocal repair on the line mentioned, from Take 14. I would assume this idea was abandoned in favour of Take 14 being finally used as the master, but this would also explain why both takes survived on the master reel.

The masters of 'Girls! Girls! Girls!', 'Return To Sender' and 'Song Of The Shrimp' on Celluloid Rock and Elvis Sings Girls! Girls! Girls! (Memory) have longer fade outs compared to the same masters on FTD's Girls! Girls! Girls! extended soundtrack, Double Features and The Complete Single Collection.

Different remixed versions of 'Return To Sender' can be found on Elvis 30 #1 Hits (E1) and Return Of The Rocker.

It has been claimed that the late Bobby Keys played saxophone on 'Return To Sender' but these claims are unfounded, with no proof.

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.