In light of recent photos of Renee Zellweger, a conversation has begun about plastic surgery. (Zellweger responded to the uproar, telling People magazine, "I'm glad folks think I look different! I'm living a different, happy, more fulfilling life, and I'm thrilled that perhaps it shows.") But whether or not Zellweger had plastic surgery is irrelevant, and the reality -- and potential repercussions -- of going under the knife is worth exploring in further discussion.