Everyone knows Ellen loves scaring her guests, but Jennifer Aniston clearly forgot and got quite a scare!\rbr\rbrIts not easy to scare Ellen, as Jennifer Aniston learned the hard way in this backstage video.\rbr\rbrJennifer Aniston announced that she will be in a movie where she sings! Ellen thought it might be helpful if she practiced on the show -- watch now to see if .\rbr\rbrJennifer Lopez isnt afraid of anything… except maybe the person dressed up like a cougar.\rbr\rbrEllen Scares Jennifer Aniston Ellen Scares Jennifer Aniston on ellen Ellen Scares Jennifer Aniston on ellen shows Ellen Scares Jennifer Aniston on Ellen shows .