The 28-year-old 'Teenage Dream' hitmaker sent Stewart a text message to clarify things, reported Aceshowbiz.
"I know you've seen all this stuff but you know I would never disrespect you. I'm not that person," Perry wrote in the message.
Stewart and Pattinson parted ways after the actress was caught cheating on him with married director Rupert Sanders. Post which Pattinson was linked to Perry as they were spotted hanging out on various occasions.
The singer, who was earlier dating John Mayer, also talked about her break-up with the rocker. "He pulled away. That was a big hello for me.
I realised I could lose the person I loved and I had to deal with some things, issues I think a lot of women have. You can be strong in one aspect of your life but submissive in another," Perry said.