"He has no intention of taking these children out of their mother's life," Kaplan said. "We have no doubt that she loves the children immensely and they are bonded with her."

Federline's household provides more consistent routines for the boys, Kaplan said.

"If you have one home with structure and one without structure, the children will be confused," he said. "Kids don't like discipline imposed on them and they would choose the one without structure. But there's a need for consistency."

He said Federline has been employing a well-qualified nanny who has been involved in the boys' care since he took custody.

Seacrest apparently woke Spears up when he called her for the interview, and at times she didn't seem to understand his questions. When Seacrest asked Spears whether the intense coverage of her recent troubles has been "overwhelming," she said, "Wait, what?"

However, she then said: "People talk and they say what they want at the end of the day, you know in the tabloids and in the magazines," she said. "But you just try to keep on doing what you do, like, you know, and as long as you know what's up and you know what's true, that's all that really matters, you know?"

Spears' "Blackout," her first studio album in four years, was released Tuesday. Besides a video for "Gimme More" and a widely panned performance at the MTV Video Music Awards, she hasn't promoted the record.

Spears said she didn't do anything special to celebrate the release — "we watched movies ... had fried chicken."

She said her favorite "Blackout" song is "Heaven on Earth": "It's a cool track. It's like, I love the producers who did that and it's kind of different from all the other songs."

As for rumors that she was dating Dallas Cowboys quarterback Tony Romo, Spears said: "Who?"

The interview ended abruptly when Sims took the phone, saying Spears had left to take a shower.