Sideshow: Costner keeps up his procreativity

Dances With Wolves

auteur

Kevin Costner

and his wife, German handbag designer

Christine Baumgartner

, are expecting their second child, his rep told Agence France-Presse yesterday. Costner, 53, and Baumgartner, 34, already have a 1-year-old son,

Cayden Wyatt Costner

, born in May 2007.

Costner has three kids from an earlier marriage to childhood sweetheart

Cindy Silva

and a fourth from a relationship with

Bridget Rooney

.

Eminem

says the title of his next CD will be

Relapse

. The Detroit rapper made the announcement Wednesday on Sirius Satellite's on-air launch party for his book

The Way I Am

.

Are

John Mayer

and

Jennifer Aniston

, who celebrated the musician's 31st birthday Wednesday at an exclusive Beverly Hills cigar bar, back together, as Us Weekly contends? Or are they just friends?

We're not really sure. No one is. Yet.

Madonna

performed a show Wednesday night in Boston just after announcing that her marriage to

Guy Ritchie

was headed for divorce. She didn't talk about it to the audience. (Why should she?)

But, reportedly, she dedicated her tune "Miles Away" to the "emotionally retarded."

Said Madonna, "You may know a few people like that. God knows I do."

ABC has canceled producer

Ashton Kutcher

's

Opportunity Knocks

after three whole episodes, USA Today reports. The series was a game show with a brilliant gimmick: The show's set and crew went to the contestants' front lawns.

David Duchovny

, who recently completed a rehab program for sex addiction, has released a joint statement with his wife,

Téa Leoni

.

"In light of continuous speculation over the lives and marriage of Téa Leoni and David Duchovny, the couple have confirmed that they have in fact been separated for several months," the statement says. "The couple had hoped to keep this separation private for the sake of their children." (The couple have two kids,

Madelaine

West

, 9, and

Kyd

, 6.)

But wait, there's more

London tabloid the Daily Mail contends the couple's marriage fell apart not because of David's addiction, but because of Téa's infidelity.

The Mail says David discovered explicit text messages on his wife's cell, sent by that rugged cowboy

Billy Bob Thornton

, 53, who has tasted the joys of marriage (and divorce) five times already.

DJ AM

(

Adam Goldstein

), 35, who survived a Learjet crash that killed four others and badly injured his friend

Travis Barker

, tells People he is "the luckiest man alive."

In his first interview since the incident, DJ AM says that he and Barker were engulfed in flames when Barker opened the emergency exit door.

"I tried to cover my face as I jumped through a fireball. As soon as I hit the ground," he said, "I remembered, 'Stop, drop and roll.' So I started rolling."

DJ AM, who was treated for second- and third-degree burns, said, "My emotions go back and forth. I can't believe I made it. I'm just grateful."

Lisa Bonet

, 40, who is once again gainfully employed (she stars on the kooky time-travel cop show,

Life on Mars

), tells People mag she is expecting her third baby.

"I'm seven months, and I feel great," Bonet says. "I've had a tremendous amount of energy, which is lucky, because I have a 14-month-old."

Bonet and her bf

Jason Momoa

, who began dating barely two years ago, already have a toddler, daughter

Lola

.

Bonet also has a 19-year-old daughter,

Zoe Kravitz

, with rock's self-lovingest studmuffin

Lenny Kravitz

.

Bonet says she'd rather not find out in advance the sex of the baby.

"When my friends ask me, I say, 'I really don't know,' " she says. "I love the mystery and I trust the mystery about it. It adds a whole other component at the end."

Ryan O'Neal

, 67, and his son

Redmond

, 23, were both charged Wednesday with felony possession of methamphetamines stemming from a Sept. 17 arrest when police found the drugs in Ryan's Malibu house.

Ryan says the drugs weren't his. He says Redmond has long battled with drug addiction.

The elder O'Neal's lawyer,

Mark Werksman

, says Ryan "found it extremely frustrating and upsetting" to be charged.

"He's not a drug user," Werksman says, "and he doesn't want to be thought of as a drug user."