Pop star Katy Perry has reportedly cancelled her planned birthday party in Egypt due to "safety concerns".

The Roar hitmaker, who turns 30 on Saturday (25Oct14), intended to mark the milestone with a celebration in the African nation and a trip down the Nile River during a three-week break from her Prismatic World Tour.

However, Perry has now axed the planned trip amid rumours her itinerary had leaked and fans could find out her whereabouts, according to The Hollywood Reporter.