“The irony of those who are willing to do plastic surgery, facelifts or whatever just to look beautiful. Many of them forget the fact that beauty is not fully reflected in what other people see.”
Related quotes

“Sometimes people are beautiful.
Not in looks.
Not in what they say.
Just in what they are.”
Variant: Sometimes people are beautiful.
Not in looks.
Not in what they say.
Just in what they are.
Source: I Am the Messenger

“Some people look for a beautiful place, others make a place beautiful.”

“Blessed are they who see beautiful things in humble places where other people see nothing”

“I wish I had a twin, so I could know what I'd look like without plastic surgery.”
As quoted in On Being Blonde (2004), by P. Munier, p. 84

Source: 1975, The Philosophy of Andy Warhol (1975), Ch. 4: Beauty

Conversations with Žižek by Slavoj Žižek and Glyn Daly (Cambridge: Polity Press, 2004), p. 50