EXCLUSIVE PHOTOS - Britney Spears Is Still Slaving Away On Her Upcoming Album

Today a makeup-free Britney Spears was spotted arriving at the recording studio in Hollywood, but prior to this we caught her visiting ANOTHER studio in the valley and squeezing in a trip back to her house -- talk about a busy woman!

We just found out Brit is moving to a new $20 million pad in Calabasas, and it sounds like it's a huge upgrade over her last place. Think the pop princess has finally found her perfect castle?

As for her video for Hold It Against Me, choreographer Brian Friedman is speaking out to the naysayers. He tweets:

Britney Fans... I DIDNT edit or direct the video so please do not place hostility at me if you arent happy with what you have seen or see. Britney worked her ass off for this video and she and I hope that you all love it. Xo Thank U every1 4 the support :) I havent seen the vid yet, all I kno is how Brit was on set & she was FAB! FEMME FATALE will be incredible!

Well put, Brian.