Jennifer Aniston's 52nd birthday, her former Friends co-star Courteney Cox shared how she has the sweetest nickname for her.The Scream actress revealed the cute moniker in an Instagram post, showing the close friends together with Courteney's daughter, Coco, who is also Jennifer's goddaughter.MORE: Jennifer Aniston has a heavenly bedroom inside $21 million mansionIn the post, Courteney highlighted the longevity of their friendship, writing: "Happy birthday Jenny Louise! We've known each other so