Is Katy Perry ticklish

She did an interview with Popworld in 2004 where the interviewer kept on insisting that she let him tickle her. Finally, she agreed and stood up, putting her arms up and exposing her midriff. The interviewer squeezed her side briefly, and Stefani seemed to snicker and pull away slightly before sitting back down and insisting that she's not ticklish. Whether or not you believe her is up to you I guess ;)