In a perfect world we'd all be beautiful, or would we? Wouldn't the world be a boring place if we all had pert little noses and perfect boobs or pecs?

So why is plastic surgery so popular? Should we try to change our god-given features? Are we all too vain?

Tell us what you think.

• Are supermodels too thin?
• Is there an idealised view of beauty?
• When does the need for plastic surgery become an obsession?
• Under what circumstances is it acceptable to go under the knife?
• Is personality really more important than first impressions?
• What can we do to avoid going under the surgeon's blade?
• What would you have done?
• Why are some people so vain?

You're so vain, you probably think this song is about you, don't you, don't you? ...