Britney Spears is back and in the center of attention – good attention this time – and ex-husband Kevin Federline is squeezing in on her comeback stage.

Pop princess Britney Spears has grandiosely released a new album, “Circus.” The first single, “Womanizer,” has topped the charts, proving how eager her faithful fans were to place her on that throne again. She will start a world tour in the coming months.

This month she turned 27 and celebrated by traveling to Europe and back in the US promoting her album. She is on the cover of Rolling Stone and Glamour magazine, looking very much like her lovely old self.

A documentary aired a little while ago giving Brit the chance to tell her side of the story, to comment on the hectic past year and on slowly recovering and gaining some kind of normalcy in life.

The world is just as attentive now towards Britney Spears as it was when she ran a one-crazy-woman show, whether it is because they honestly want her to be ok or because they don’t want to miss the moment she might slip again.

Either way, Britney Spears is everywhere. And guess who wants a slice of all this interest? Why, the one and only Kevin Federline, former backup dancer, would-be rapper, sometime actor, husband and father of her two toddler sons, of whom he has sole custody.

The 30-year-old father of four (he has daughter Kori, 6, and son Kaleb, 4, with ex-girlfriend Shar Jackson) revealed to People magazine how he has coped with his divorce from Britney Spears, her meltdown and taking care of their sons Sean Preston, 3, and Jayden James, 2.

He has said it before and says it again now: being a father to his two sons is the most important thing in the world for him and it apparently always was so. He and Britney married, he says, and then had one child and then a second. “For me, I’d become more concerned with my children. Not that I ignored Britney, but my kids are always most important.”

He goes on to say they were having “complications” in their relationship and that he did not give her an “ultimatum,” he was merely “trying to work stuff out with her” and then his pop superstar wife went and filed for divorce behind his back.

And there you have it. He was the devoted daddy while Britney was uncooperative.

The two married in September 2004, after about half a year of dating, welcomed their two sons in September 2005 and September 2006 respectively and were officially divorced in July 2007. As of July 2008, Federline has full custody of the boys.

Spears confessed to Rolling Stone magazine she had never imagined her husband would leave her.

Asked by People magazine about the infamous January incident when Britney refused to hand over the boys as visitation had ended (she was eventually taken by ambulance to Cedars-Sinai Medical Center and held for psychiatric evaluation), Federline replies that it was one of his “lowest points of depression.”

While he may no longer be in love with his former wife, he still loves her, he added, and wishes her the best – “to be in the best health and doing what she loves to do.”

Britney Spears, who has been under the co-conservatorship of her father since January and who will remain so indefinitely, now has visitation rights three days a week, with one overnight stay. Federline says there is “structure” in how they take care of their children.

He also suggested a reconciliation with the pop star was possible.