Jennifer Aniston?s birthday celebrations in Cabo, Mexico had a shaky start on Friday when her private jet had to make an emergency landing. According to Sky News the jet carrying Jennifer and a group of her friends, including Courteney Cox was delayed forced to land after it lost a wheel during take-off. A private jet carrying Jennifer Aniston and Courteney Cox was forced to make an emergency landing in California, after it lost a tyre during take off.