Ellen DeGeneres and Portia de Rossi (Getty Images)Portia de Rossi and her other half, Ellen DeGeneres, have seemingly survived the Hollywood marriage merry-go-round. Both stars came out with grace and style — despite the surrounding media frenzies — years before they tied the knot in 2008. That was a whopping five years ago, a lifetime in celebrity years.

What's more, since the ceremony, the couple has somehow managed to remain front-and-center in the public eye while still preserving a modicum of personal space. Sure, they posed on the cover of People and made an appearance on "Oprah" when they got hitched (mainly to promote marriage equality), but their time at home together remains reasonably undocumented.

And it seems they like it that way, as Portia recently explained during an interview with Out magazine.

Kristen Stewart and Robert Pattinson (Getty Images)Kristen Stewart rang in her 23rd birthday with those closest to her … including boyfriend Robert Pattinson, of course.

The "Twilight Saga" couple kicked off birthday festivities Tuesday night at Malo restaurant in the Silver Lake neighborhood of L.A. before heading to nearby No Vacancy bar to continue the celebration.

Diddy (Getty Images)Kate Upton (Getty Images)
Kate Upton nabbed plenty of attention last year for her smooth moves doing the "Cat Daddy" dance, but rest assured she won't be bustin' a move to the "Cat Diddy" anytime soon.

Earlier this week, the New York Daily News reported that the Sports Illustrated cover girl and rapper Diddy were getting "hot and heavy" in Miami and were spotted "sucking face." However, according to both stars, those reports are completely false.

The 20-year-old model took to Twitter to set the record straight. "Really??? Not at all true..“@TheCut: .@KateUpton and @IamDiddy seen sucking face and dining out!"

In fact, the super babe is still single after splitting from Detroit Tigers Pitcher Justin Verlander near Valentine's Day.

Meanwhile, the 43-year-old music mogul posted his own denial. "Attention all Media. I don't even know Kate Upton personally! I'm not dating her! What's being reported is not true. END of story!" Diddy tweeted Wednesday afternoon.

He then took advantage of the media attention to promote

Rihanna rides with Chris Brown (Instagram)On again? Only two days ago a report surfaced saying that Rihanna and Chris Brown had broken up, and that the sultry singer was choosing to focus on work and her current world tour.

Wednesday, however, brings further confusion regarding the yo-yo romance: Rihanna posted a photo of she and Brown driving around sunny L.A. together to her Instagram account.

"That s--t look like toupee," she captioned the shot, quoting a Brown lyric that refers to his fondness for convertibles (which the two happened to be riding in).

(Txema Yeste/Marie Claire)In the world of celebrity news, Scarlett Johansson and Ryan Reynolds' two-year marriage seems like it's in the distant past.

Tom Cruise and Katie Holmes, Heidi Klum and Seal, and even Jennifer Lopez and Marc Anthony have split since Johansson and Reynolds called it quits in late 2010.

But as 28-year-old Johansson reveals in a new interview with Marie Claire, she still vividly recalls when she -- not Blake Lively -- was Mrs. Ryan Reynolds.

"Well, it wasn't that long ago," the notoriously private Johansson says of her two year-marriage. "But I think I've had a fair amount of time to process the experience and be able to move forward. I continue to get to know myself better as I get older, and that helps me in my relationships."

Kate Holmes and Tom Cruise (Getty Images)

UPDATE: A rep for Cruise disputes Bunte's account of the interview, telling "omg! Insider" that the report is "all false," that they took minor things said out of context, and that the divorce was never even discussed in the interview.

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Apparently, Tom Cruise was as surprised as everyone else when news broke that he and Katie Holmes were getting a divorce.

"I did not expect that," Cruise said, opening up about his split for the first time on German TV network ProSieben (as reported by Bunte.de).

Rihanna performs in L.A. (Getty Images)It sounds like on-again, off-again couple Rihanna and Chris Brown are indeed … off again.

Amid reports that Brown and Rihanna have split, the "We Found Love" singer alluded things are complicated with her ex during her L.A. performance Monday night at the Staples Center.

Jenna Dewan-Tatum (PAMELA HANSON/GLAMOUR)Jenna Dewan-Tatum (PAMELA HANSON/GLAMOUR)

Channing Tatum may be one of Hollywood's most sought after actors, but he is currently playing the role of supportive husband.

Jenna Dewan-Tatum flaunts her growing baby bump in the new May issue of Glamour, and the "Witches of East End" actress is opening up about her marriage to Tatum, 32.

"Most actors and actresses are consumed by careers and getting ahead," Dewan, 32, reveals. "Channing and I are ambitious, but our relationship comes first. We take everything day by day, saying, 'OK, how can we make this work together?'"