Britney's been busy in the studio recording her much anticipated follow-up to 2008's Circus, but she may be working on her biggest song yet this week, according to her manager, Adam Leber.

Yesterday Leber tweeted, "Brit is recording a big big BIG new song on Friday with #MaxMartin & @TheDrLuke. I'm pretty sure it's a smash!"

Considering Max Martin previously engineered her smash hit "... Baby One More Time" as well as "3" and "If U Seek Amy", and Dr. Luke produced "Circus", we don't doubt this one will be a smash!

Dr. Luke, who previously worked with Brit on Circus chimed in with an update for fans, "Please continue to wait 4 Britney's new song!!!!"

But with great news like this, how can we wait?