Music
Rex Features
The British R&B star and producer, who is collaborating with Spears on her new LP, suggested that her previous record Blackout failed because of her troubled private life.
He told the Glasgow Sunday Mail: "Her career is riding on this record so I need to sit down and talk to her to make sure she is ready. The songs will be good - she has Kanye, Pharrell, Timbaland and me doing tracks for her.
"It is more a matter of whether she is mentally and physically ready for this. On the last album, Blackout, she was tired and people were forcing her to put another album out."
He added: "If she is ready, it will be huge - she just came with Blackout too early."
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