Both amazingly brilliant songs and both incredibly different. I think if I had to say I would say Lucky. AHHHHH but Piece Of Me is just as amazing!

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Britney you are my idol, my role model, my inspiration and my hero. You inspire my life everyday. You mean everything to me and you will be my idol forever. I love you with all my heart.

I cannot compare those two songs, 'cuz they're totally different one from another...
but, if I have to choose, then POM!

different different songs......
but piece of me all the way... i gotta say that lucky is one of my less fave songs

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http://es.youtube.com/user/MissBFan

there both so awesome and very different but, i gotta say i prefer 'piece of me'
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These songs are too different to choose. I like both songs very much.

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For me Piece of me is better!!!!

they're both 2 completely different songs!