Til It Happens To You features in the documentary movie The Hunting Ground, which tackles issues surrounding campus rapes in American educational institutions.
Perry had formerly suggested Gaga's involvement in the track was just a way to garner some buzz around the song, and the full credit should really be given to Diane Warren.
She had tweeted: "Normally I wouldn't respond to all this but I don't know Im feeling spunky. There was another artist that originally was gonna sing #TIHTY.
"I have Diane's original demo with her singing. The only line that has been changed "Till you're at the end, the end of your rope"
"Originally was "TIL YOU GOT A HOLE RIPPED IN YOUR SOUL". So I guess technically one line was changed so sure Gaga possibly "rewrote" a line.'
"But chances are Diane still took part in rewriting that line which means Gaga contributed a few words. Is that writing? Not in my book.(sic)"
Warren later took to her own Twitter page to insist Gaga's involvement was more than changing just one line. Gaga retweeted Diane's messages but has yet to comment on the situation herself.
*Warning: Music video contains graphic content that may disturb*
- Bang! Showbiz