Smith, who has previously worked with Tinchy Stryder, N-Dubz and Pixie Lott, revealed that he worked on three tracks with the 'Toxic' star, admitting she was "fantastic" to work with.
"We worked on three tracks and I love them all. I turned up straight from the plane and she was fantastic," he told Dean Piper.
"She made coffee for us all in the studio, her voice was strong and she was totally focused on her music.
"I couldn't have asked for a better experience. I just hope the tracks make the final cut for the album."
Spears releases her as-yet-untitled seventh studio album in March 2011, preceded by the single 'Hold It Against Me'.