Britney and K-Fed

As the custody battle over their two children heats up, the tabloids are revving up their coverage of the love lives past and present of Britney Spears and husband Kevin Federline. Here they are in happier times, kissing for the cameras at the 2004 Billboard Music Awards in Las Vegas on Dec. 8, 2004. Spears filed for divorce Nov. 7, 2006, ending their two-year marriage.

Musicians Britney Spears and Kevin Federline were all dressed up when they arrived at the 2006 Grammy Nominees party with Kanye West, hosted By Verizon Wireless and Rolling Stone Magazine at the Avalon Hollywood, on Feb. 6, 2005, in Hollywood, Calif.

The following year, Britney Spears and husband Kevin Federline are seen arriving at the SONY BMG Grammy Party held at The Hollywood Roosevelt Hotel on Feb. 8, 2006, in Hollywood, Calif.

A few hours later, the two arrive for the LG Mariah Carey and Jermaine Dupri Post Grammy Party at a private residence Wednesday, Feb. 8, 2006, in Beverly Hills, Calif.

Britney Spears looks up at Kevin Federline as he answers questions at the LG Mariah Carey and Jermaine Dupri Post Grammy Party at a private residence Wednesday, Feb. 8, 2006, in Beverly Hills, Calif.

Britney Spears, right, and her husband Kevin Federline are seen in this Wednesday, Feb. 8, 2006, photo in Beverly Hills, Calif. That was just months before Spears told late night talk show host David Letterman Tuesday, May 9, 2006, that she is pregnant with baby No. 2.

Britney Spears and Kevin Federline cuddle backstage at the 8th Annual Teen Choice Awards at the Gibson Amphitheatre on Aug. 20, 2006, in Universal City, Calif. Spears was pregnant with their second child, a son born in September.

A very pregnant Britney Spears and Kevin Federline attend the July 10, 2005, premiere of "Charlie and the Chocolate Factory" in Hollywood. Two months later, their first son, Sean Preston was born.

The couple appears happy as they walk through the theater grounds during world premiere of Warner Bros. Pictures' "Charlie and the Chocolate Factory," Sunday, July 10, 2005, in the Hollywood section of Los Angeles.

Britney Spears and Kevin Federline stop to walk their dog on the red carpet during the 2004 Billboard Music Awards Wednesday, Dec. 8, 2004, at the MGM Grand Garden Arena in Las Vegas.

Divorce papers show that Britney Spears has filed for divorce from Kevin Federline in Los Angeles Superior Court Nov. 7, 2006, in Los Angeles. Spears is seeking custody of their two children Sean Preston, 1, and Jayden James, 2 months.