What has happened to Ali Lohan

Her sister is the one always in the news..but the younger Lohan is turning some heads for her drastic transformation. I was sitting in my hairdressers this week and was shocked when I saw these photos in US Magazine....on the left..Ali last year...and on the right a picture taken of the 17 year old in the past month! Her modeling agency, NEXT models, is denying that any type of enhancement or plastic surgery has taken place. I don't know what's taken place but I doubt she grew a chin, cheeks and a different nose overnight.