Sources: Husband’s Alleged Affair Caused Shania’s Split May 20, 2008

What caused the sudden breakup of Shania Twain and her husband, music producer Robert “Mutt” Lange, after 14 years of marriage? His relationship with another woman, say several sources.

Reached by PEOPLE after the separation was announced in a statement, Lange called the split “an unfortunate thing.” He added, “It’s literally just a growing apart, that’s all.”

But sources close to the situation say a third party was involved: Marie Ann Thiébaud, a longtime secretary and manager of the couple’s chateau in Switzerland. “Mutt and Marie Ann left their spouses for each other and are still in a relationship,” says one source.

Lange denies the claims. “It’s absolutely not the reason [for the separation],” the famously reclusive producer told PEOPLE when asked about the alleged affair. He also denied that he was in a romantic relationship with Thiébaud: “I’m not, no,” he said. “It’s not true.” (Thiébaud could not be reached for comment.)

Twain, 42, and Lange, 59, married in 1993. They have a 6-year-old son, Eja (pronounced “Asia”) D’Angelo.

An insider says the “You’re Still the One” singer is “devastated. This came out of left field. . . She loved him.” Another source close to Twain tells PEOPLE the Canadian-born star is coping with the help of “a very close-knit group of family and friends.”

Kate Hudson and Owen Wilson Break Up Again May 16, 2008

Despite a flurry of engagement rumors, Kate Hudson and Owen Wilson – Hollywood’s most notorious on-again, off-again couple – have called it quits, less than two months after rekindling their romance in Miami.

The end of their erratic courtship (they began dating in September ‘06) comes amid erroneous reports that the pair were engaged, fueled by photos of Hudson wearing a Tiffany & Co. ring (it was a prop!) both on-and-off set of her film Bride Wars, which she’s filming in Boston.

“It was a pretty bad breakup,” says a Wilson pal. “Owen said it was a tough one. He definitely doesn’t want to dwell on it. He wants to put it behind him.”

Since the split, Hudson, 29, and Wilson, 39, have each been spotted letting loose. On May 9, Hudson and Bride Wars costar Steve Howey, 30, visited Boston’s Liberty Hotel bar, Alibi. And on May 11, Wilson dropped by N.Y.C.’s Upstairs with two women.

“He was pretty chummy with the ladies … he was certainly doing some sweet talking,” according to an onlooker. “He looked happy to be there hanging with them.” The late-night outing was followed by a visit to Butter the next night, where he chatted up a sexy blonde. Says a Hudson source: “She feels dumb thinking it was so serious.”