His spokeswoman told the New York Daily News Manilow is "absolutely not" in the midst of a health crisis.
The agreement awards Federline sole legal and physical custody of the boys and gives Spears visitation rights.
Joel will play at the stadium on Wednesday, July 16 and Friday, July 18.
Cole's representative has confirmed that she has been struck down by the chronic liver disease.
The 59-year-old pop veteran has befriended the young soap actress and is giving her tips on how to be successful in the U.S.
Spears "is spending her summer in the recording studio, working on a brand new album," her manager confirmed.
Sir Elton John joins Phish, Jerry Garcia and Dave Matthews who have all had Ben & Jerry flavors named after them.
© 2008