Well, flame me, but I'm a runner and its all about power to weight ratio, you cannot be carrying excess weight if you want decent times. I'm the same weight I was in my early twenties. And I know plenty of women my age (37) who are the same. For me, its all about listening to your body instead of ignoring it.
Not all of us are a size 16, or even a 14, and not all of us put on weight slowly throughout life. So yes, women and men who are carrying excess weight look chubby to me. Particularly the men. I can't believe how many young men are chubby. Its really not a good look. As for looking beautiful inside and out, your appearance reflects your personality to a certain degree.
Call me shallow, but if I were single, theres no way I'd contemplate going out with a chubby man, no matter how "nice" he was.
For the record, I'm 5 feet 2 and 52kg. I recently let my weight creep up to 55kg but lost it quite quickly once I did something about it. Interestingly, I had a knee injury through running which cleared up as that little bit of excess weight went away, which has told me a lot about how to stay fit and active and avoiding injury in later years. It really has cleared up from having 3 less kilos to carry, although I wasn't heavy in the first place.