It was first confirmed by her Manager Grace Mendoza that Charice was joining the cast of GLEE. "Yes, it's true, Charice will soon join ‘Glee,’ Mendoza said. "And not just as a guest, but as part of the cast in a new season."
Well sorry but it's not true that's according to Charice Pempengco US Manager Marc Johnston and even Charice herself denied the news on her tweeter.
**UPDATE**
But she will be on Glee. :)