I can't wait, and i've been a fan since her first single. "Blackout" is my favorite Britney album, so if it's as slick as that, I'm going to be happy. Britney and Danja are amazing together. "Get Naked", "Freakshow", and "Gimme More" are still fresh and sound modern even today - which shows that in 2007 she was ahead of the game. Britney has something that special - it's that X factor that is keeping her around - she may not be the best, but she's Britney Spears - somehow that happened.
As far as GaGa is concerned, I like her to, but she has yet to thrill me in concert. I was underwhelmed with the first leg of the US Monster Ball aside from a few scenes. I'm going again soon, so I'm hoping to change my opinion. GaGa just has not won me over 100% yet - but she may soon. I don't think she's any threat to Britney - Britney's fanbase is huge and hardcore - so if she delivers, she'll be fine.