Katy Perry is sick of hearing her international chart-topping single “I Kissed A Girl.”

That makes two of us.

“The song follows me around wherever I am in the world, it’s all people wanna hear,” Katy complains. “But I can’t get too sick of it as it’s paying for my grandchildren’s college tuition. Maybe in three years I’ll retire it or something.”

Katy says she once heard the song playing while she was out grocery shopping: “It’s funny in certain situations – like when you walk into the grocery store and they’re playing it and then I get in my car and it’s on the radio. I’m like: ‘Please. I get it.’”