Britney's Hubby: Don't Call Me Mr. Spears

NEW YORK – Don't call him Mr. Britney Spears.

After six months of marriage to the pop star, Kevin Federline (search) is emerging from Spears' shadow. On the March cover of Details magazine, the former backup dancer is for the first time stepping out to reveal something about the man known as Britney Spears' (search) second husband.

To begin with, Federline is done with dancing.

"I'll always dance for fun, but for work? I've done it, dude," Federline tells Details in an issue to hit newsstands Feb. 22.

Instead, Federline's ambitions lie in creating a fashion line with Spears, which he says, could launch sometime this year.

"I'm gonna design the men's and she will design the women's. We're thinking about calling it Pair A Dice — because dice are lucky for us."

Before marrying the 23-year-old Spears last September, Federline, 26, had appeared in the movie "You Got Served" and performed as a backup dancer for Justin Timberlake (search) — Spears' former boyfriend.

"I'll tell you one thing, dude — I never thought that any of this [stuff] would happen," he says.

Federline was previously involved with actress Shar Jackson (search) of TV's "Moesha." They have two children — a 2-year-old and a 6-month-old named Kaleb Michael Jackson Federline.

Now, Federline says he and Spears are as happy as can be.

"I could go on forever about my love for this girl," he says. "She's more proud of me than anyone has ever, ever, ever been in my lifetime. Ever."