Her boobs were digitally toned down to appear smaller in the official poster for the 5 December (10) concert.

A source tells UsMagazine.com, "Her team thought her boobs looked too big."

It's not the first time Perry's breasts have caused her problems - Sesame Street bosses were forced to axe her performance of Hot N Cold last month (Oct10) on the kids show when parents complained about her busty look.