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Ashton Kutcher's style wasn't cramped at all in the wake of Demi Moore's health crisis -- he was partying Tuesday in Sao Paulo, Brazil at a Bruno Mars concert and a nightclub.

Heidi Klum's eyes were spotted last night on an L.A. street.

Klum was driving with her mom past a car accident and apparently saw photogs on scene, so she hid the best she could.

Seal refuses to give up on his marriage -- wearing his wedding ring out in L.A. today ... despite Heidi Klum's plans to divorce him.

Seal braved the rain in a dark gray suit on his way into a studio moments ago ... two days after TMZ broke the story his wife's calling it quits.

As we previously reported, Seal is scheduled to tape a segment for Ellen later today to promote his new album. He's expected to give an interview as well as perform. No word on whether the subject of divorce will be off limits.

Chris Brown and Rihanna are NOT back together, despite rampant rumors to the contrary ... Breezy's rep tells TMZ.

As we previously reported, Chris and Rihanna were spotted out at the same West Hollywood nightclub Sunday night. They left separately, but there was lots of speculation that the two had gotten back together.

But that's not true -- according to Chris' rep, the singer was with his actual girlfriend last night ... an aspiring model named Karrueche Tran ... not with Rihanna.

Kevin Federline was rushed to the hospital after his heart showed signs of distress.

The pic shows Kevin wearing an oxygen mask earlier today in Australia, where he was shooting a reality show, "Excess Baggage."

Federline -- who is 33 years old and significantly overweight -- was playing football with an Australian rules football team when he fell ill. K-Fed, who is 6', weighs 231 lbs.

We're told he spent the night in the hospital for observation.

Just hours before TMZ broke the story about Heidi Klum gearing up for divorce, Seal arrived back in L.A. after a quick trip to London -- wearing massive shades, a red scarf, an enormous-collared jacket, and a grim expression.

Lindsay Lohan and her left nipple did a little shopping yesterday, hitting up the jewelry store XIV Carats in Beverly Hills.

Hugh Jackman and daughter Ava played around in the snow today, tossing a few snowballs at a photog as they walked through the West VIllage.

Melissa Etheridge reunited with her ex-GF Tammy Lynn Michaels for a mommy & mommy meal with their 5-year-old twins this week ... but afterward, Tammy let the world know they still DESPISE each other.

The gang met up for an overpriced lunch at Jerry's Deli in Woodland Hills, CA -- but when she got home, Tammy tweeted, "Sometimes you gotta plaster a sh*t-eating grin on your face for the sake of the kids.:-) "

Rihanna was hanging by a few small threads in Hawaii yesterday -- testing the structural integrity of a tiny black thong bikini, while sunning her 23-year-old buns in the ocean ... on a paddleboard.

Whatever floats her butt.

"Avatar" actress Zoe Saldana is one real-life badass action hero -- rushing to the aid of an elderly woman in L.A. yesterday ... after a car accident left a bloody gash on the lady's face.

According to reports, 33-year-old Zoe was driving along in Culver City when she noticed the accident and jumped into action -- helping the woman out of her car and onto the sidewalk.

Saldana called 911 on her cell phone -- and then stayed by the woman's side until an ambulance arrived.

​Muscle god Chris Hemsworth celebrated the news that his gorgeous wife Elsa Pataky is pregnant with their first child just like anybody else would ... by diving down an inflatable slide off a helicopter-carrying luxury yacht with Matt Damon in St. Barts on Wednesday.

This is how Thor and Jason Bourne unwind.

For the first time since accidentally walking into a spinning plane propeller last month, model Lauren Scruggs was pictured in seemingly good spirits as she left a Dallas hospital with her parents on Tuesday.

The 23-year-old lost her left eye and left hand in the horrific Dec. 3rd accident and has been undergoing extensive rehab.

According to a federal report just released, the pilot of the plane claims he attempted to warn Scruggs about the propeller and guide her to safety. When he thought she was out of harm's way he returned to his seat, only to then hear someone scream, "Stop, Stop."

While on a trip to Mumbai on Monday, Oprah Winfrey got all decked out in a chic sari, the silk garment popular with women in India.

Lil' Kim -- and her badonkadonk -- tried to relive some of their hip-hop heydays by droppin' it like it's hot while on stage at a party at an IMAX movie theater in Tampa this weekend.

Before ticking off Elton John's husband by winning for Best Original Song at the Golden Globes last night, Madonna got into another altercation ... by accidentally stepping all over Jessica Biel's unfortunate dress on the red carpet.

But Biel didn't feel the need to rant on and on about it on Facebook, as she and Madonna appeared to laugh off the fashion faux pas moments later.

No fighting over material, girls.