bc you are saying how they look and sometimes act but it really depends on how you are using it like if you are saying it to a girl friend then i would say lovely bc thats more like expressing your self but ill say it again depends on how you are using it
The adjective that is better would be the word beautiful, the dictionary for beautiful states "pleasing the senses or mind aesthetically." While the word lovely in the dictionary is "exquisitely beautiful." It depends on how you use the word but as you can see the definition of lovely has the word "beautiful" already in it which gives it more dominance.
