Rebel Wilson has sparked concern from her fans after sharing a photo from her latest vacation.The Australian actress, 40 - who recently hit her weight loss goal - has been delighting her followers by sharing a multitude of snapshots from her Aspen skiing holiday, but some images left fans urging Rebel to look after herself.MORE: Rebel Wilson wows in tiny black dress - and fans reactIn the photos, Rebel was posing on the slopes wearing a pair of skis and wrapped up in a Fendi jacket, goggles and