11/27/2007 AT 11:50 AM EST
Who's the 7th most-influential man under 45? Well, according to Details magazine
, that man is Kevin Federline
. And they even gave him the cover!
Technically, Britney Spears
's ex-husband shares the spot with former Anna Nicole Smith
beau Larry Birkhead – under the title "The Good Fathers" – as the publication declares, "By being more visible presences in their children's lives than many Hollywood A-listers, they emerged as unlikely candidates for Dad of Year."
In accepting the honor, Federline, 29, tells Details
: "To be a father is ... everything. It's the best thing in my life."