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Kevin Federline, Spears' ex-husband, still has sole physical and legal custody of the children.
Scherzinger has denied the reports, insisting the singer is like family.
"It came to me from a situation that happened to me," he said.
The rapper has made $150 million in the last year.
It was attended by many of the star's family and friends - but Madonna was allegedly upset about the no-shows.
The "Smile" singer's scuffle was caught on camera as she left Ronnie Scott's jazz club in the early hours of Tuesday morning.
Stories that his marriage was in trouble appeared on the internet after he was seen without his wedding band.
The New Kids on the Block singer and his wife have been married nine years
Lopez insists her rigorous exercise regime can benefit new mothers who question their ability to bounce back into shape.
"The record industry is a very political place at the moment," she wrote on her MySpace blog.