Most beautiful are (according to me): Gauri Pradhan, Prachi Desai, Pallavi Subhash, Sonam Kapoor, Sonali Bendre (in her time she was so pretty), Chritangada Singh, Penelope Cruz, Greta Garbo, Peggy Lipton, Brigitte Bardot, Ingrid Bergman.
Well if you are asking about the most beautiful actress then i'll def say Katrina Kaif and Sanaya Irani...These 2 are really pretty and gorgeous...I like Neha Bamb too(Kripa of "kaisa yeh pyar hai") !!