I had a friend at college who simply loved herself and assumed that the whole world loved her too! She had a pair of brown leather knee high boots that were, admittedly, fairly expensive compared to the boots the rest of us had on our student budgets, but boy did we hear about them, how much they cost, where they were from etc etc.
Anyway, one day another girl on our course came in in a pair of boots similar to the ones that the I-Love-Myself girl had, and I-Love-Myself girl sauntered over to her and said 'Your new boots are lovely, oh you've got such good taste, they're just like mine. Well obviously not as expensive as mine, but cheap doesn't have to mean nasty'
She also said to another girl on our course 'I don't think you're very pretty, but I do think you've got a nice personality though so don't worry, it makes up for your looks'
Strangely everyone took these nasty comments from her as she had this weird knack of delivering them in a sweet, sugary, syrupy way, so that it would leave the recipient a bit confused as to whether the comment was nice or awful, until they'd thought about it.