By Breaking Celebrity News Staff

So far, so good, for Britney Spears.

Despite some concerns, the 30-year-old Toxic singer debuted in strong fashion on The X Factor's first live episode Wednesday, delivering a professional, polished performance on the judges' panel alongside Simon Cowell, L.A. Reid and Demi Lovato.

The resurgent mother-of-two was fair in her critiques -- sugary sweet when she enjoyed the performance, and constructively-critical when the outing merited it.

She told Jason Brock, who sang Jennifer Lopez's Dance Again, "I really feel like you could have chose a better song, but overall it was interesting and entertaining."

Brit also thrived as a mentor: She advised 13-year-old Carly Rose to follow in her footsteps and don a school uniform in her performance of (ironically) Christina Aguilera's Something's Got A Hold On Me. While the judges gave Carly mixed reviews, Britney reinforced her young apprentice's confidence, telling her that her "vocals were amazing" and that she'd done a "great, great job."

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After one of her singers, Diamond White, got