Britney Jean Spears turned 27 today, and, in honor of her birthday and the release of her album, Brit took over the set of the Big Apple Circus during GMA and performed two tracks. It's difficult to see her expression in this clip, but her face was completely blank while she lip synced "Circus." In Britney: On the Record, Brit talked about how performing is the one thing that makes her happy, but it certainly doesn't seem that way. Gyrating around with circus freaks, her unhappiness is even more palpable. On the upside, her kids were in the second row of the audience and they were wearing adorable hats. Clip above.

Earlier: Britney: On the Record: I'm Sad