He may have partied until dawn, but parenting was on the mind of Kevin Federline Friday night into Saturday morning in South Beach.
Capping a week in which he and ex Britney Spears seem destined for court in their custody battle, K-Fed was in Miami - but his mind was in L.A.
"Kevin was in a great mood, and even talked about a new song he is working on, called 'Daddy's Home,'" says a source at Mansion on South Beach, where K-Fed (as host) and his party of 10 stayed until 4 a.m. Saturday.
Aww. So sweet. At Mansion, Kevin Federline, dressed in an over-sized, blue, long-sleeved, oxford shirt and jeans, spent much of the night chatting with the club's host, Lyndon Smith, another single dad.
"We talked about our kids, parenting, what that's all about," Smith says.
Scrubs stars Zach Braff and Donald Faison, along with Cacee Cobb, Jessica Simpson's BFF and former assistant, came late and hung with Federline while he danced with his group of friends, including one guy from his hometown.
"Kevin is a great dancer with some very complicated moves," says another source at Mansion. "He wasn't with any one girl in particular. He was friendly and nice to everyone and in a wonderful mood."
Federline, 30, checked into the Gansevoort Hotel on South Beach Friday, where he asked staffers to call him "Kevin" and even signed autographs.
"Kevin seemed happy and was very gracious," said an eyewitness. "He stopped and took photos with anyone who asked."
Saturday brought more high-living for K-Fed - who was reportedly offered a huge modeling contract recently - and his entourage.
They spent the day on a private luxury yacht with Chris Jones of the Opium Group and Mansion host Smith, who brought Federline to Miami after he had recently appeared as "Father of the Year" at Prive in Las Vegas.
"We hung on the boat all day and late into the night," a source at sea said. "We just relaxed, fished, ate, swam and had a great time."