貪 靚 E n g l i s h ~ 唔 該 ~

It's 'beauty consciouse' - just like 'self-consciouse'.
eg - She's a beauty consciouse lady.
Depends on how formal you want it to be.
Hope that helps.

Usually, people sometime use "aesthete" to say someone love beauty very much. On the other hand, i never heard "貪 靚 " this adjective in english, but you may say somebody's hobby is make up or someone interest in make up. Wish can help.

love beauty

貪靚是口語，愛美才是書面語。

Be picky about one's apperance.

Picky - 吹毛求疵的;挑剔的
e.g. She is so much picky about her apperance because she is always trying to be a queen in everyone's eyes.

愛漂亮的 - buckish

LIKE beatiful