When you do a search, be specific and type in the name of the celebrity. For example, lets say you are writing a hub about Jennifer Aniston. Her latest photo shows her new hair-do, so add to your search Jennifer Aniston new hair do. That will bring up her current photo. for a celeb such as Johnny Depp, add the title of his latest film, or add the word "Oscar".
Also, adding the word "oscar dress or attire" will bring up some great photos. Search more than one site.