A worthwhile discussion forum thread popped up on LDS.net, in which the question is posed in its LDS Mormon Forums, in the Gospel Boards under Learn about the Mormon Church -- Plastic Surgery?
An excerpt:
A talk was given a couple of years ago, I believe by President Monson,
while a counselor to President Hinkley. He talked of too busy lives,
body modifications, etc. Counseled against, to learn to love ourselves
for who we are but not by way of commandment, just counsel or advice.
This is followed by a lift from Jeffrey R. Holland's article “To Young Women,” published in November 2009 in Ensign:
In this same vein may I address an even more sensitive subject. I plead
with you young women to please be more accepting of yourselves,
including your body shape and style, with a little less longing to look
like someone else. We are all different. Some are tall, and some are
short. Some are round, and some are thin. And almost everyone at some
time or other wants to be something they are not! But as one adviser to
teenage girls said: “You can’t live your life worrying that the world
is staring at you. When you let people’s opinions make you
self-conscious you give away your power. … The key to feeling
[confident] is to always listen to your inner self—[the
real you.]” And in the kingdom of God, the real you is “more precious than rubies."
Every young woman is a child of destiny and every adult woman a
powerful force for good. I mention adult women because, sisters, you
are our greatest examples and resource for these young women. And if
you are obsessing over being a size 2, you won’t be very surprised when
your daughter or the Mia Maid in your class does the same and makes
herself physically ill trying to accomplish it. We should all be as fit
as we can be—that’s good Word of Wisdom doctrine. That means eating
right and exercising and helping our bodies function at their optimum
strength. We could probably all do better in that regard. But I speak
here of optimum health; there is no universal optimum size.
Read it all.