Nurse!

NFL legend John Madden is recovering after undergoing open heart surgery -- and is "expected to fully recover" ... so says NFL commish Roger Goodell.

Yolanda Foster thinks she'll bounce back now that she's split from estranged husband David Foster.

Yolanda's been battling a severe case of Lyme disease, and sources say she's convinced it got worse when things got rocky with David. Lyme disease attacks the nervous system and stress is the enemy.

Our source says Yolanda constantly leaned on David during their marriage, but toward the end he was traveling a lot and she couldn't handle the change and got really sick as a result.

Now that they've pulled the plug on their marriage, she has no expectation that he'll be around, and that's actually dramatically improved her health.

Yolanda's still struggling with Lyme disease, but she's mobile again and feels she's on the mend.

Kate Upton's gotta turn down the intensity when it comes to cornhole -- somehow she injured herself playing a sport so laid back, most people do it with a drink in their hands.

We got the supermodel at LAX, just a couple days after she posted a pic of her swollen and bruised right foot ... and she was still feeling the pain.

Watch as Kate explains how in the world she got hurt in the first place, and why the injury's forcing her to do one of the most UN-supermodel things.

The good news for Justin Verlander -- her face and bod still look pristine.

A female fan bit "The Walking Dead" star Norman Reedus on his chest at a zombie convention this weekend ... but the biter is now off the hook according to law enforcement sources.

Cops tell TMZ, Reedus -- who wasn't hurt during the attack -- declined to press charges against the biter since it was only a nibble.

A rep for New Jersey's Walker Stalker Con says event security was standing a couple feet from Reedus when the fan opened her mouth and tried to take a chunk out of his chest.

Cops and event security jumped into action and booted the biter from the convention. The rep says the woman has been banned from all future Walker Stalker conventions and other sponsored events where Norman is present.

Mariah Carey is hooked up to IVs in a NYC hospital after falling severely ill early Wednesday morning ... TMZ has learned.

Mariah is getting pumped full of fluids and vitamins to fight off a nasty bout of the flu. We're told she was so dehydrated and ill ... her team made the call to get her emergency treatment.

She started feeling bad after an appearance at Pier 1 in NYC on Tuesday evening. There was extra concern about her health because she has a huge performance Saturday night at Hot 97's "Hot for the Holidays" concert in NJ.

We're told she's going to be fine, and could be released later today.

Better safe than sorry.

Lil Wayne fell off his skateboard a few too many times ... and that's what led to the gruesome elbow scar he's now showing off with pride.

According to our sources, Weezy had the surgery last month after putting it off for as long as he could. We're told he wanted to avoid going under the knife, but eventually he gave in.

Wayne posted a photo of his mangled arm and wrote, "Skate lyfe!!!"

Is that a good thing?

This is the new normal folks ... Brielle Biermann -- daughter of ex "RHOA" star Kim Zolciak -- getting lip injections, because being 18 just isn't good enough.

It looks like this may have been a 2-for-1 deal, because Brielle and Kim covered their faces Wednesday as the arrived at LAX.

Brielle posted the gnarly procedure in time lapse. She says, "my lips are my biggest insecurity and I'm so happy with the results now!"

Lil Boosie is asking fans to pray for him because he just found out he has kidney cancer.

The Louisiana rapper posted his plea on Instagram, saying, "prayer is power that's why I'm letting the world know" about the diagnosis, but his announcement caught some people close to him off guard.

We're told Boosie's team was not happy he revealed his condition ... which is why the caption was deleted shortly after the initial posting. The photo of Boosie eating a meal remains on his IG.

Boosie is only 33, but he's been living with diabetes for years.

He just got out of prison last year ... after serving 5 years on a drug charge.

#prayfaboosie

'DWTS' dancing pro Anna Trebunskaya looked fabulous when she arrived at the big after-party at Beso Tuesday night, but an hour and 40 minutes later she was puking her brains out.

Anna beat a hasty retreat just after 11 PM but lost it at the front door. The gnarliest part ... she's wiping her mouth when someone asks her for an autograph and she obliges.

The concrete was spattered with blood outside the Miami Gardens home where St. Louis Rams WR Stedman Bailey was shot Tuesday night ... after a drive-by shooting left him and another man hospitalized.

A neighbor who says he spoke with police claims he was told officers counted 33 shell casings at the scene.

Bailey and another man were sitting in a car outside Bailey's family home when a car rolled up and opened fire at 8:45 PM ... striking Bailey twice in the head. The other driver was hit multiple times, reportedly while trying to shield two children in the car from the gunfire.

According to cops, the victims drove themselves to a nearby hospital for treatment. Bailey is listed in critical but stable condition and is set to undergo surgery early Wednesday morning.

Bailey's neighbor says the NFL player has a good reputation in the area and was not known for being involved in dangerous activity -- "he's a good guy."

Khloe Kardashian is in bad shape and her family is in a panic because someone in their klan died from a staph infection.

Our Kardashian sources tell us Kris Jenner is "freaked out" because her step-father died from a hospital-borne staph infection. Harry Shannon was in a car accident in 2003, went to the hospital, contracted staph and died. Khloe's diagnosis has sent Kris into a panic.

What's more, Kim tried to visit Khloe Wednesday but her doctors ordered her to stay away because she's 8 months pregnant and it's too dangerous.

As for Khloe, she's getting IV antibiotics and so far the staph is still in her system but doctors are hoping the meds will knock it out.

Khloe Kardashian may have contracted a staph infection from visiting Lamar Odom's bedside ... but the hospital insists it's not a hotbed for the skin infection.

A rep for Cedars-Sinai Medical Center tells TMZ their incidence of staph infections is below state and national benchmarks for hospitals.

They say staph infections are notoriously common ... adding a large percentage of the population have staph bacteria on some part of their body.

As we previously reported ... Khloe cancelled several book tour appearances after developing a lesion on her leg. She's battling staph and believes she contracted it during her visits with Lamar.

Cedars says the best way to prevent the disease ... wash your hands.

Alt-rockers Hinder were involved in a gnarly tour bus crash Wednesday that sent 3 from their crew to the hospital and a search and rescue out for the tour bus driver's beloved service dog, Cuzco.

The band were traveling to their gig in Charlotte, N.C. when their bus slammed into a semi-truck on a stretch of highway outside of Cookeville, TN. The band's bass player, Mike, and lighting guy, Clint, both suffered broken ribs. The tour bus driver was transferred to a Nashville hospital for surgery.

The band put out an APB on their Facebook page following the crash for the driver's Australian Shepherd Cuzco ... who went missing after the collision. Cuzco has since been found uninjured.

The band's show in Charlotte tonight has been cancelled.

Khloe Kardashian contracted a serious staph infection at the hospital where Lamar Odom is laid up, and it's so bad she's had to cancel a portion of her book tour.

Lamar has been hospitalized at Cedars-Sinai Medical Center in L.A. for a month, and Khloe has been a frequent visitor.

We're told Khloe has a lesion on her leg which became incredibly painful. She developed a high fever, swollen glands. She's also sweating profusely with intermittent chills.

One very connected source tells TMZ, "It's so scary. She's so sick."

Khloe cancelled several appearances for her book promotion, tweeting, "I'm sick & dr's orders are that I need to lay low until we narrow down what's wrong."

Michael Lohan was just rushed to the hospital after suffering a possible heart attack.

Law enforcement sources tell TMZ Lohan was at a Florida Department of Children and Families office for a 3-hour monitored visit with his kids. We're told he began to sweat profusely and experience chest pains, so DCF agents called 911.

One source tells us he's on heart meds and when he started getting sick his mom was called and she was rushing his medication over, but his condition worsened.

Docs are running tests to see if he suffered a heart attack.

Charlie Sheen knows many of his sexual partners are lining up to sue him for allegedly exposing them to HIV -- but he insists Bree Olson can take a seat, because she has NO case.

Sources close to Charlie tell us Bree was lying when she told Howard Stern she was living with Sheen around the time he was first diagnosed, and he'd kept her in the dark about it.

We're told Sheen is adamant ... he didn't KNOW he'd contracted the virus until AFTER he got back from his 20-city tour, which ended on May 3, 2011. Olson famously broke up with Charlie nearly two weeks prior to that date via text message.