Putting together a fitness routine

Need some help figuring out a workout routine! I'm very petite (5'1") and ideally am trying to get my legs like this:

http://lh6.ggpht.com/_z4Z5fKapSLI/SpVNnBfc7mI/AAAAAAAAHE8/YbYGwc4PG_k/s800/sienna_miller_legs_show_hot_8.jpg

I've googled her exercise routine but of course she claims she "doesn't work out." No way I believe that! Any suggestions?