Mila Kunis dealing with weight issues after Black Swan

London, Mar 9 -- Fast weight loss can result in fast weight gain -- in all the wrong places, says Hollywood actress Mila Kunis who feels her body hasn't been the same since she lost 20 poundsfor her role as a ballerina in "Black Swan".Mila says she never fully recovered after losing 20 pounds for the role of Natalie Portman's ballerina frenemy in the film as she regained the weight in different areas, the Daily Star reported."(My body) has never been the same. My shape is different. When I got down to 95 pounds, I was muscles, like a little brick house, but skin and bones. When I gained it back, it went to completely different areas... All the weight that left my chest went to my side hip, my stomach," she said.The "Friends with Benefits" star added, "What often happens with extreme weight loss and when you lose weight very quickly is that you lose muscle tissue but unfortunately, when we gain the weight back, it comes back as fat."