Kevin Federline is K-fed-up with Britney Spears' hard-partying ways, and now even he's telling Brit to check herself into rehab – for the sake of the kids.

According to Star magazine (via MSNBC), estranged hubby K-Fed has tried "every possible angle" to get Britney to chill out and get some help, but it clearly hasn't helped. First, says Star, he threatened taking the kids away, and then he tried "pleading." Finally, he's tried to get his mom-in-law, Lynne, to join the chorus. "He's afraid she's going to hurt herself," says a Star source.

For K-Fed, apparently, it's now all about the kids. "They're being raised by strangers," said a source.

Could Nick Lachey be taking a swipe at Jess' now-public hook-up with John Mayer? He once again wagged his finger at his ex Jessica Simpson, saying he took "the high road" in his divorce and added that he made "the most of the situation." The singer told People, "You have to ... always take the high road. You never want to look back and regret the way you acted." Lachey was accepting Cosmopolitan magazine's "Fun, Fearless Male of the Year" Award on Monday. Nick has been cavorting with professional eye candy Vanessa Minnillo while Jess has been Mayer's no. 1 groupie in recent days, joining him on his tour bus.

A website purporting to have a tape of Paris Hilton taking a bubble bath and in other "racy situations" launched yesterday, and Hilton's rep says the hotel heiress is exploring "all of [her] legal options" to deal with it. The site, ParisExposed.com, claims to have a variety of photos, home videos, diaries, and phone numbers, items that TMZ first reported to have been taken from a storage facility. Bardia Persa, the creator of the site, says all the goods "were acquired by me through a broker," and that he obtained the stuff in September. Bardia is charging $39.97 for access to the site.

Perhaps Leonardo DiCaprio has just had enough of supermodels. After a night of furious calling and texting in London, as recounted by the Mirror, the just-Oscar-nominated Leo might be on the outs with girlfriend Bar Rafaeli. He reportedly finds her "clingy." ... Speaking of outs, the Derek Jeter and Jessica Biel fling might already be a thing of the past. Each, says Page Six, has been seen "flirting" with others; Jeter with actress Gabrielle Union and Biel with Justin Timberlake ... After shock jocks Opie and Anthony trumpeted the fact that Donald Trump had called them to talk about his hostilities with Rosie, the Donald says he won't appear on their show anymore. Turns out, says Page Six, that they invited him on.