Nurse!

Joe Paterno fell and fractured his pelvis yesterday -- this according to a source close to his family.

The 84-year-old former Penn State football coach -- who's currently undergoing chemotherapy treatment for lung cancer -- was admitted to a local hospital after taking the tumble at his home, but will not need surgery.

Kevin Federline was hospitalized in Australia last month after over-heating during production of a weight loss reality show called "Excess Baggage" ... a rep for the show has confirmed.

According to the rep, K-Fed was participating in a segment in a part of the Outback that's known to get VERY hot ... when the show's medic deemed he was "showing signs of heat stress."

Federline was taken to a nearby hospital and treated -- but he eventually returned to the show ... which is still in production.

You'll remember ... a hefty K-Fed was spotted jogging around Los Angeles last month (see above and below) ... and he didn't look like a guy who could withstand exercise in extreme heat.

Rick Ross will not be caught off guard in case he suffers another medical emergency -- the rapper now travels with his own special medical kit, just in case the seizures strike again ... TMZ has learned.

As TMZ first reported, Ross suffered not one ... but two seizures on the same day in October while traveling to an event.

According to multiple sources, Ross wants to make sure he's prepared in case it happens again ... and put together a kit that includes 3 different prescription medications, vitamins, water and an inhaler.

We're told Ross is serious about having the kit near him at all times ... and often requires a member of his entourage to carry it around wherever he goes.

There are worse things an entourage member can be asked to carry around.

Los Angeles Lakers owner Jerry Buss is hospitalized in L.A. for blood clots in his leg ... this according to a rep for the team.

We're told doctors believe the 77-year-old's condition was caused by "excessive travel."

Supermodel Marisa Miller was one bloody accident away from losing a finger in high school -- telling TMZ, a wood shop band saw nearly claimed her pinky ... and she has the scar to prove it.

Call off the search party ... Kate Major has been found -- and it turns out ... she was never really missing in the first place.

As TMZ first reported ... Major was taken from rehab to a nearby hospital in Florida Saturday night, after suffering a seizure -- but when the rehab facility called to check on her hours later ... the hospital had no record of her.

Kate's rep and family were completely freaked -- but it was a false alarm ... because Major was in the hospital after all ... just under a false name for privacy reasons.

Michael Lohan's life is in the hands of doctors ... who are performing surgery on Mike's heart in an effort to unclog an important artery ... this according to Lohan's rep.

TMZ broke the story ... Lohan had trouble breathing and speaking a couple of weeks ago ... and docs believe the trouble stemmed from Mike's ticker.

Now, the rep tells us ... Lohan is currently undergoing a procedure to "repair a blockage."

Tyrese says tainted seafood did a major number on his insides -- sending him to an L.A. hospital last night ... TMZ has learned.

According to a rep, Tyrese is recovering at home today ... but before he left the hospital he fired off a twitpic of his feet in the hospital bed -- and the message, "ER...pray for me."

Ty's rep says the singer/actor started feeling sick almost immediately after he went out for a meal yesterday.

Lil Boosie tells TMZ ... he's finally realized he's a hardcore drug addict ... and now that he's been sentenced to prison, he wants to focus on kicking the habit.

As we previously reported, the Louisiana rapper was sentenced to 8 years in prison Tuesday after copping a guilty plea for attempting to smuggle drugs into prison -- 3 separate times.

Now, Boosie's lawyer tells us ... the rapper is happy with the resolution -- because Boosie is confident officials will allow him to participate in a drug rehab program so he can beat his addiction to codeine and other drugs.

Boosie -- who's also facing 1st degree murder charges in an unrelated case -- released a statement to TMZ ... saying, "Don’t worry about me I am getting help with my drug addiction and I am accepting full responsibility for the choice I made."

Michael Lohan is set to go under the knife tomorrow, but today ... sources close to MiLo tell TMZ he is having trouble breathing and speaking as he rests up for the surgery.

As TMZ first reported, Lohan will undergo heart surgery on Monday and have a stent inserted. Sources close to Lohan tell us heart problems run in the family.

Michael Lohan did not have surgery as planned yesterday, TMZ has learned, because doctors discovered additional blood clots in his lung which required treatment before they could operate.

As TMZ first reported, Lohan was rushed to the hospital on Thursday after complaining of chest pains and doctors determined he needed surgery.

According to our sources, doctors discovered blood clots in one of his lungs in their original examination ... but discovered more yesterday. So, we're told, they put him on medication to break down the clots and rescheduled the surgery for Monday.

Michael Lohan was rushed to the hospital last night and will undergo heart surgery today ... TMZ has learned.

According to our sources ... Lohan, who is currently in a court-ordered treatment center in Florida, was not feeling well last night and complained of chest pains. We're told he had his blood pressure taken, and when it came back 200/110 ... he was immediately taken to the hospital.

After undergoing tests, our sources say doctors decided Lohan needed a stent in his heart and scheduled surgery for today. We're also told doctors discovered blood clots in one of his lungs.

It's fun to say the "Twilight" movies are so bad they might be hazardous to your health -- but now that could actually be true!

According to several reports, the graphic birthing scene in "Breaking Dawn: Part One" has caused some moviegoers to suffer from seizures.

In Sacramento, a man told CBS13 he began to have a seizure during the scene and his wife described him as "convulsing, snorting, trying to breathe."

A man in Utah had the same thing happen to him, telling ABC-4, "I didn’t really remember what happened, after that I think I blacked out. According to [my wife], I was shaking and mumbling different noises."

George Clooney posed for a picture with legendary Baltimore Ravens offensive lineman Jonathan Ogden during today's Ravens game ... and OH MY GOD WHAT HAPPENED TO GEORGE!!?!?!?

Clooney's rep says he recently underwent elbow surgery.

Joe Paterno has been diagnosed with a treatable form of lung cancer ... this according to his son Scott.

Scott just released the following statement: "Last weekend my father was diagnosed with a treatable form of lung cancer during a follow-up visit for a bronchial illness. He is currently undergoing treatment and his doctors are optimistic that he will make a full recovery."