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Christina Aguilera is firing back at rumors she's somehow responsible for a giant bruise on her son's face -- telling friends little Max simply had himself a little fall at the park ... chasing squirrels.

The photo was taken yesterday afternoon at LAX -- with rumors circulating that Christina's "erratic behavior and alleged booze-filled outings" somehow contributed to Max's accident.

But sources tells us, that's total nonsense -- 3-year-old Max was out with his nanny last week, chasing around squirrels ... and the kid tripped over a rock and bruised his face.

According to our sources, Max was taken to the doctor immediately and everything was fine. No broken nose, no stitches. Just your average boyhood bruise.

As one source put it, "Christina is a great mom ... Max is her #1 priority."

Apparently, Bar Refaeli has started a trend ... because just a few weeks after the Israeli model dipped herself in mud at the famous Dead Sea ... some smokin' hot Brazilian model tried to show her up.

Model Suelyn Medeiros (left) -- whose butt you may recognize from the SEXIEST DUI EVER -- mucked around in Israel this week ... and fortunately for the rest of the world, she brought along a bathing suit and a camera.

So we gotta ask ...

Megan Fox left little to the imagination by rocking a tight, form-fitting mini dress in L.A. on Monday.

LeBron James slam dunked into Barcelona by jumping off a high dive overlooking the city and into an Olympic pool on Monday.

It's been 14 years since "My Best Friend's Wedding," but Dermot Mulroney proved he's still got the bod of a newlywed by going on a shirtless run and showing off his buff chest and abs in Santa Monica this weekend.

After winning some sort of "celebrity" boxing event in Fort Lauderdale this weekend, Octomom Nadya Suleman showed off what a shark attack giving birth to eight kids at once will do to your body.

She's scarred for life.

Kris Humphries and Kim Kardashian emerged from their Montecito hotel this afternoon, their first time being spotted as husband and wife.

And certainly not the last.

It's a big moment of any wedding -- the bride being walked down the aisle -- and here's the first photo of that moment from the big Kim Kardashian wedding ... shot from thousands of feet in the air and through a tent.

Judging from the menu above, the guests at Kim Kardashian's wedding dined on a fine meal last night -- but the question is ...

Brutal divorce? Bitter custody battle? Multiple trips to rehab? It was all water under the bridge this weekend as Charlie Sheen and Brooke Mueller yucked it up in Mexico.

As TMZ first reported, Charlie decided to whisk Brooke south of the border as a reward for how well he thinks she's been doing with rehab ... and to celebrate her birthday.

Is this a precursor to another walk down the aisle?

Octomom donned head gear and GIANT boxing gloves and defeated someone named Cassandra Andersen in a celebrity boxing match last night in Florida.

Lindsay Lohan looked exhausted as she left the Kim Kardashian wedding in Montecito, CA last night -- while her 48-year-old mother Dina still had plenty of energy, yukking it up in the back seat with a friend (Mel B, is that you?).

Kim Kardashian made a brief appearance outside her hotel this afternoon -- talking to sister Kourtney as she gets ready to walk down the aisle.

It's nice they were able to share an intimate moment before things get crazy.

Bill and Hillary Clinton displayed a little PDA in the streets of NYC today ... as they walked hand-in-hand down Madison Avenue, flanked by Secret Service.

Charlie Sheen and Brooke Mueller have officially left the country ... together ... and TMZ has learned the private jet carrying the twosome has touched down in Mexico.

The former couple hopped on the jet late Friday afternoon ... judging by the photo they posed for on the plane (above), they look like they're heading on their honeymoon all over again.

Charlie tells TMZ ... he decided to take Brooke on the trip as a reward because she's been, "busting her ass with the boys, and [she's] more sober and healthy than I've ever seen her."

As we previously reported ... Charlie has made it his personal mission to help get Brooke the treatment she needs to finally conquer her addictions.

Still, we gotta ask...