Feeling healthy and helpful makes me feel beautiful.
A body that is trying to become healthier (e.g. through exercise, a better diet, etc.), or that tries to help someone else, is a beautiful body.
I have bipolar disorder, and every time I make these efforts, I feel like a more beautiful person

The beneficial effect of these activities, at least for me, rises above whatever the media throws at me. Nowadays, I'm pretty much able to ignore the media completely.
Lastly, a beautiful face and body are not those that are physically perfect. Rather, I believe that a person's life, inner goodness, etc. shine through. A flawless face can be utterly forgetful because there is nothing interest inside. A person's character, integrity, and life history can make even a "plain" or "flawed" face utterly gripping and unforgettable.
Good luck.