Posted on Thu Sep 20th, 2012 7:45am PDT By X17 Staff
We're still speechless that Britney Spears used her real voice to sing!
The pop star and mother of two celebrated fellow X Factor judge LA Reid's birthday with a rendition of Happy Birthday ... and presented him with a cake.
We knew you had it in you, Brit! Let's hope this is the start of a "non lip-synching" trend for you.
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