Nicole Richie has been super-skinny for years; it’s hard to believe she ever weighed more than she did now. Andersen says, “It is inspiring for women to see other women get down to a healthy weight and then keep it off for many years. Nicole Richie has successfully accomplished this.”

But of course, most of us can’t expect to get down to her svelte weight. “Nicole has a very petite frame and this level of thinness may not be obtainable for all body types.”

So instead of trying to copy Nicole’s look, just aim for a BMI range of 22 to 25. Andersen also says that adding weight training to your exercise routine can help keep your muscle and aid in weight maintenance.