I've usually memorized the yrics by the time they come to be recorded.
Mind you, I don't sing or rap so the fact that I commit them to memory, for a short period of time, is just me having written, edited, reworked and revised the lyric a squillion times. Something I'd imagine a political performer would want to do.
Not long after the song's been completed the my memory fades.
It's the same with the chords or lines I play. 3 months later they're, largely, gone so I refer to the chord charts & lyric sheets Im prepare as props for performance so that I can revisit stuff.
I have limited space in my HDD so employ auto delete to unused information that matches the RAM space needed in my frontal lobes to perform the current task & recall it for repeats over the short term.