Celebrity Knowledge News Today

Youre going to want to watch tonight. we have katy perry, so shes going to be talking to us from las vegas, where she has her residency that just kicked off. shes going to sing her new song called "when im gone," havent heard it yet. so exciting. and we have so many other celebrities. david arquette, patti labelle, duran duran, earth, wind and fire, the list goes on and on. and some surprise guests too that i dont want to give away just yet. >> come on! one! >> lets just say we have someone that...