To beat the other competitors, you must have skills, a good behavior, a good facial expression that make people look at you.
Winning changes anybody's life. For example, a girl wins a miss world crown. This will obviously change her life. She will get fame, more offers of doing business etc.
Obviously winning any competitions can change your life with the fame. Winning any summer wear competition can make you famous among people around you. If you win summer wear competition in real, people around you will usually talk about your skills and facts that make you winning that competition.