Beauty

While their families own the NY Giants and the Pittsburgh Steelers, sisters Kate Mara from "House of Cards" and Rooney Mara from "The Girl with the Dragon Tattoo" played nice at a premiere in NYC this week.

Question is ...

While the San Francisco 49ers and the Baltimore Ravens go to battle on the field -- there is a much bigger war brewing on the sidelines.

It's a Super Bowl showdown as Baltimore Ravens coach John Harbaugh goes up against his younger brother, San Francisco 49ers coach Jim Harbaugh.

Question is ...

Dressed similarly in blue-ish outfits, hard-partying Hollywood playboys Gerard Butler and Mel Gibson were in good spirits as they hung out for dinner at Zuma in Miami on Thursday night.

We're told the new BFFs were with a large group and chowed down on fancy 28 oz steaks, caviar and even threw back some sake ... without incident.

Here's Skid Row lead singer Sebastian Bach at an award show in Hollywood this week (left) -- and Michael Jackson's ex-wife Debbie Rowe back in 2005 (right).

Pretty young things.

It's been 14 years since Dallas Cowboys superstar Michael Irvin hung up his cleats ... but the guy is still SHREDDED ... and last night, he proved it.

The 46-year-old Hall of Famer was outside of a party in New Orleans last night -- talking about his new vitamin company -- when he and our camera guy started braggin' about their physiques.

But Irvin -- always one to back up his talk -- lifted up his shirt and proved he's still got a killer 6-pack.

Here's gorgeous Oscar winner Charlize Theron in L.A. on Thursday (left) -- and bubblegum pop star turned wannabe tough guy Justin Bieber last year (right).

Only one is wearing lovely diamond earrings.

Because you never know when you might be involved in a home invasion again, Taye Diggs is making sure he stays in great shape and hit up Equinox gym in L.A. on Wednesday.

Earlier this week, the buff 42-year-old chased down and single-handedly apprehended the guy trying to break into his house.

Beyonce was on a mission today to PROVE she can sing the national anthem like a pro – belting out a LIVE version of "The Star-Spangled Banner” moments ago on TV … without the help of a backing track ... and she KILLED IT.

Beyonce was at the news conference for her upcoming Super Bowl halftime show when she launched into the impromptu performance -- and when she finished the song, she simply said, “Any questions?”

During the conference, Bey was asked about the lip-syncing situation at the Presidential Inauguration last week, and she admitted she used a backing track -- claiming, "I am a perfectionist ... I did not have time to rehearse with the orchestra [at the Inauguration]. It was a live television show and a very important moment for me."

Beyonce added, "Due to the weather, due to the delay, due to no proper sound check, I did not feel comfortable taking the risk … so I decided to sing along with my pre-recorded track, which is very common in the music industry. And I’m very proud of my performance."

A reporter then asked Beyonce if she planned to sing live at the Super Bowl, and she replied vaguely, "I always sing live" ... but she didn't say whether she planned to use a backing track as well.

Game's over bitches -- TMZ has already found the most beautiful two people attending the Super Bowl this weekend ... and you'll NEVER guess who they are.

Broncos wide receiver Eric Decker and his country singer fiancee Jessie James touched down last night in New Orleans, where they'll be staying to watch the Super Bowl this Sunday.

Decker's not playing -- obviously -- but that won't stop him and his girl from COMPLETELY OVERSHADOWING every other hot couple expected at the big game ... a list that includes tons of other NFL players, Victoria's Secret models, Hollywood actors, actresses, you name it.

Disagree with our expert opinion? Tell us in the comments section, where you'll still be wrong.

Kim Kardashian's unborn kid is proving to be a big star ... as the growing fetus made a splash by bulging out of her belly on Wednesday.

With her lovely girls also on display and busting through her sheer tank, Kim and her baby bump went for a late prenatal workout in L.A. last night.

"Game of Thrones" star Jason Momoa -- who also played Conan the Barbarian in the 2011 remake -- is finally revealing how he maintains his insane physique ... sexercise.

Momoa -- who recently chopped his trademark locks -- was out in NYC last night when we started talkin' gym habits ... specifically, how do you stay in shape ... CrossFit? Pilates?

"I f*ck a lot" ... Momoa said.

Seems like it's working ...

It took just four weeks, but Katherine Webb -- and all her gorgeousness -- have made it to the Super Bowl.

After a meteoric rise to fame after Brent Musburger famously gushed all over her at the BCS Championship game earlier this month, the 23-year-old Miss Alabama USA 2012 made her big game debut covering Super Bowl media day for "Inside Edition" in New Orleans on Tuesday.