Jennifer Lopez: 10 Reasons She Rocks on American IdolFrom her stylish wardrobe to her sage advice and sincere emotion, here's why we love Judge J.Lo

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Updated: Thursday Mar 31, 2011 | 06:00 AM EDT

1. SHE'S SWEET

Whether it's calling contestants "baby" or admiring a singer's shoes, Lopez is quick to compliment the Idols when they're good – and let them down gently when they're bad.