Larry Birkhead and Kevin Federline, who spent a good deal of 2007 battling for custody of their respective offspring, are "America's new parental role models," according to Details magazine. "The Good Fathers," as the magazine calls them, are on Details' roster of the 50 most influential men under the age of 45, with Britney Spears' ex-husband gracing the issue's cover.Zac Efron, Shia LaBeouf and "the Disney kids" top the list, which also includes the likes of Ryan Seacrest, Facebook founder Mark Zuckerberg, Columbine High School killers Eric Harris and Dylan Klebold, country group Rascal Flatts, Ellen DeGeneres's former dog Iggy, "Harry Potter" and Jay-Z.
