"Great job copying Broods! A+ for originality," posted another, with a third suggesting Perry, "Maybe try not ripping off @broodsmusic."
The latest accusations come after a jury last month ordered the 34-year-old singer and her record label to pay out NZ$4.24 million, because her 2013 hit Dark Horse copied Christian rapper Flame's song Joyful Noise.
The comments section of Perry's post was also flooded with posts from fans criticising her, and debating whether she is innocent or guilty, of accusations of sexual misconduct, from both a music video co-star and a Russian journalist.
Josh Kloss, who appeared in the video for Perry's Teenage Dream, alleges she exposed his genitals at a party, while reporter Tina Kandelaki says Perry tried to kiss her without her consent.
Fans remain divided on the issue, with some declaring their support with #WeStandWithKatyPerry, and others imploring her to speak out and issue a statement about the controversy.
It remains to be seen whether she will also comment on claims she has copied Broods.