In a series of tweets, the famed songwriter apologises for thinking Gaga did not write enough of the song to be worthy of the nomination.
"Normally I wouldn't respond to all this but I don't know I'm feeling spunky. There was another artist that originally was gonna sing #TIHTY," she wrote.
Perry said Diane Warren penned the track and Gaga only changed one line from "till you got a hole ripped in your soul" to "till you're at the end, the end of your rope."
"I love Gaga so much respect and love this song that has nothing to do with anything. Why did Gaga get credit? Maybe because... Diane wanted to ensure her support in promoting the song. Gaga is a very smart business woman she knew a song written by Diane Warren... Would be up for an Oscar...