http://strawberrysingh.com/2013/06/10/my-sl-movie-poster-challenge/ She has a great blog.
If you want to see an original movie poster from the Burlesque movie to consider after viewing mine look here: http://www.bing.com/images/search?q=burlesque+movie+poster&id=0BBCAFEE43A6599019F869490D12F98918E09B39&FORM=IQFRBA#view=detail&id=0BBCAFEE43A6599019F869490D12F98918E09B39&selectedIndex=0
If you want to try this but don't want to do it from scratch check out Art Box here: http://maps.secondlife.com/secondlife/Klaw/128/128/34
Art Box is a very fun place to visit that has free sets to pose and play in (a BUNCH) including some movie poster scenes, and some even come with free props too. Very worth a visit or two. I check back as they just keep adding more and more.