(Cover) - EN Showbiz - The co-producer of Britney Spears upcoming album says there is still a lot of work to be done, although he has praised the singer for being really fast.

The 29-year-old pop star has wowed fans and critics with her comeback single Hold It Against Me, which will feature on her seventh studio album, Femme Fatale - due for release in March.

The star unveiled the seductive name of the record yesterday, although it appears there is still a way to go before the finished product is released.

"It's not done," explained the albums co-producer Dr. Luke in an interview with Rolling Stone.

We're in the middle of it right now. It's a little bit fluid right now. I can't even say at this stage what songs for sure are making it and what songs aren't. We're working with a lot of producers and overseeing it with her A&R and record label and management and trying to make something cohesive."

Despite the current precarious nature of the record, Dr. Luke is adamant of one thing that Britney has the determination and dedication to ensure an astounding comeback album. The songstress typically goes to the recording studio about two or three times a day, and has no time for fooling around.

"Britney's really fast," Dr. Luke beamed. "She gets it done."

Dr. Luke also revealed some of the other producers set to work with Britney. He confirmed Bloodshy, co-producer of Britneys classic Toxic, and Benny Blanco, who was involved in Katy Perrys smash hit California Gurls, are also due to make production appearances on the record. (C) Cover Media