Aubrey O'Day is rumored to have written two songs about her alleged affair with Donald Trump Jr., and even made a music vid for one of them, but it was never released.
TMZ posted previously unreleased footage of Aubrey's remake of Gotye's 2011 smash hit "Somebody That I Used to Know" ... in which she's topless with words like "Cheater," "Liar" and "Seduction" written on her body.
The video was shot around early 2012 -- after her alleged affair with DJT Jr. while she was on 'Celebrity Apprentice' -- but was never completed because O'Day failed to pay the production bills.
Aubrey's remix features tweaked lyrics to make it about someone having an affair with a married man ... who seems to fit the profile of Trump's eldest son.
For example -- "You said that was the reason for your pain / But you were scared to ruin your family's name / Your wife's the only one glad we are over."
The song goes on to take shots at the unnamed married man, calling him an "a**hole," "f***ing liar," and "some coward that I used to love."
Aubrey's 2013 tune "DJT" is also allegedly about her affair with Trump Jr. -- whose wife filed divorce papers last week.