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The band Kings of Leon has not only scheduled a make-up concert for their Houston show that was canceled completely last night, but they are also going back to Dallas to make up the show that ended abruptly on Friday ... TMZ has learned.

KOL will play in Dallas on September 21 and in Houston on September 22. Tickets for the previous shows will be honored, and refunds will be honored for fans who cannot make the new dates.

This all stems from a battle with the heat for lead singer Caleb Followill. On Friday, a show at the Gexa Energy Pavilion in Dallas was cut short after lead Followill complained the heat was messing with his voice. He left the stage ... never to return.

The band then canceled a show scheduled for last night at the Woodlands Pavilion, located just outside Houston.

Soulja Boy -- along with several members of his inner circle -- perpetuated a lie about purchasing a $55 million G5 jet ... at least that's what a spokesperson for Soulja is now saying.

Earlier this week, TMZ spoke with Soulja, a member of his management team named Shai Storm and Soulja's assistant -- who all verified Soulja dropped the cash on the private jet as a 21st birthday gift to himself.

In fact, Soulja even went on a radio show yesterday in Miami -- after TMZ's story posted -- and when asked if he bought the plane, coyly told the DJ he was "G5 status" ... but never said the story was false.

Now, Soulja's "spokesperson" Greg Miller has issued a statement on behalf of the rapper ... saying the "elaborate rumors" are "not true."

Funny, because when our reporter spoke with Soulja earlier this week -- and asked him directly, he responded, "Hell yeah ... I bought it."

Sadly, so did we.

Soulja Boy doesn't know the meaning of the word recession -- because TMZ has learned, the 21-year-old rapper is dropping $55 MILLION on a new private jet.

A member of Soulja's management team tells us ... the kid bought himself a G5 jet as a birthday present to himself this week.

The jet cost $35 mil ... but that's just the beginning. We're told the birthday boy is dropping an additional $20 million to pimp out his ride with all sorts of cool stuff ... like 12 custom Italian leather seats, flat screen TVs, 4 liquor bars, a special travertine tiled floor, and Brazilian hardwood cabinets.

We're told S.B. is also gutting the in-flight lavatory -- and replacing it with a giant, LUXURIOUS bathroom. Oh, he's also giving the jet a custom paint job ... to include his logo.

And if that's not enough for someone's 21st -- we're told Soulja's also spending $300,000 to throw himself a blowout birthday party at a Miami nightclub tonight ... and Dwight Howard, Bow Wow, and Sean Kingston are all expected to attend.

Kids these days.

Lindsay Lohan is telling friends ... she's committing herself to a healthier, more active lifestyle ... cutting way back on the late-night partying -- and what better way to do that ... than to BUY A BICYCLE.

Sources close to Lindsay tell TMZ, the actress is beginning to face facts -- it's NOT a good idea for her to party at all hours of the morning inside bars, hotels, and restaurants.

Not only is it a terrible influence on a recovering addict -- Lindsay is saying ... it gives people the impression that she's back to her old ways ... when she's not.

Former New York Yankees pitcher Hideki Irabu was found dead yesterday in his California home -- and law enforcement sources tell TMZ, it appears he committed suicide by hanging himself. We're told a friend found him.

L.A. County Coroner is still trying to locate next of kin.

Hideki played for the Yankees, Expos, and Rangers -- last pitching in the big leagues in 2002. He won World Series rings with the Yanks in 1998 and 1999.

Irabu was 42.

Story developing ...

Hustler CEO Larry Flynt is going out of town for a few weeks ... and for some reason, he wants "Tosh.0" funnyman Daniel Tosh to run his most famous magazine while he's away from the office.

Flynt just shot a video message for Tosh, saying "I'm gonna be out of town for a couple weeks and I WANT YOU to run Hustler's editorial meeting."

Why Tosh?? Flynt's people insist they were kicking around the idea of a guest editor ... and Larry just really likes the guy. Simple as that.

A Hustler rep tells us "[Tosh] will be allowed to plan the magazine's editorial meetings for one month ... he'll be given a blank canvas."

Flynt's even offering Tosh his own office with a "Hustler model secretary."

Kat Von D walked off the set of "Good Day L.A." this morning ... minutes before she was set to give an interview -- and we're told, it was all because the anchor mentioned her breakup with Jesse James.

Sources on set tell TMZ, Kat was all set to give the interview -- but flipped out when she heard how she was introduced on the show ... and walked out of the building before the interview even started.

During the introduction, "Good Day" aired a clip from Kat's show "L.A. Ink" -- showing Kat getting a tattoo of Jesse James on her side -- and anchor Jeff Michael mentioned she got the tattoo before she and Jesse called it quits.

According to sources, Kat was pissed Michael even brought up her relationship with Jesse ... and stormed out of the building.

We're told Kat approved the Jesse James tattoo clip from her show -- and even got a heads up from "Good Day" producers that she would be asked about the breakup during the interview.

It's unclear what exactly went wrong -- but Kat just tweeted, "Dear GoodDayLA, thanks for the waste of a perfectly good morning. Lack of compassion n respect for each other never fails to disappoint me."

Margera says he was racing his neighbor up a set of stairs ... and promised the guy he could have one of Bam's skateboards if he won -- but, "Somehow I wound up tumbling down the stairs."

Bam explains, "I tackled my neighbor and fell down the stairs horsing around. I’m still in the hospital."

Drake's rep released a statement saying, "We regret to announce that Drake will not be able to take the stage at Universal Orlando Resort due to a death in the family."

"He hopes that his fans understand the situation he finds himself in and know that he fully intends to return to the area in the future. He thanks Universal Orlando Resort and his fans for their continued support.”

Law enforcement sources tell TMZ ... 27-year-old Nicholas Telemaque was killed around 2:40 AM on July 4 from "multiple gunshot wounds to the upper torso."

Minaj posted photos and messages on Twitter ... saying, "Lived in Brooklyn his whole life. My precious cousin. My baby. Killed last nite."

We're told cops are investigating the incident -- but so far, no arrests have been made.

Here's what we know. Lindsay was tested twice last week. Sources tell TMZ ... Lindsay tested positive for alcohol on one of the tests and negative on the other. In both tests, she tested negative for drugs. One of the tests was administered just after Lindsay had a rooftop barbecue party.

Sources tell TMZ ... the L.A. County Probation Department will ask Judge Stephanie Sautner to yank her out of house arrest and throw her in L.A. County Jail.

And, we're told, members of the D.A.'s office -- will make an appearance as well, to lower the boom on Lindsay. The D.A. is still handling the DUI probation part of Lindsay's criminal saga. The L.A. City Attorney is handling the necklace case.

The Probation Department is pissed off because they tried to force Lindsay to take two tests in May but Lindsay's lawyer, Shawn Holley, refused to make Lindsay submit, claiming it wasn't part of her probation. Turns out it was, so Lindsay subsequently took the two tests, one of which she failed.

The Probation Dept. is also ticked that Lindsay is having parties while under house arrest.

Sources close to Harris tell TMZ ... Heidi reached out to her shortly after the breakup with Hef to offer her moral support. Bottle blondes need to stick together!

The pair decided to spend what would have been Crystal's wedding day in Las Vegas. They couldn't just go to Sin City on the down low -- instead they are hosting a party at WET REPUBLIC pool at the MGM Grand Hotel & Casino.

Peyton Manning and younger brother Eli were spotted in Brooklyn last month sporting police uniforms for a video shoot.

TMZ spoke to a rep from DirecTV who tells us the whole thing is part of a project for DirecTV -- but insisted it's NOT a commercial.

TMZ spoke with someone in attendance at the Ryman Auditorium ... who tells us Morgan's entire act was filled with offensive gay jokes ... explaining, "It was the worst thing I've ever heard ... so not funny."

The network announced the deal today, unveiling the plan which puts Katie in as host and producer. We've learned Katie's mentor -- former "Today" show EP Jeff Zucker -- will be the Executive Producer.

As we reported, Katie will make $20 million, mostly for the talk show but there's a relatively small amount for contributing to various ABC news shows.

Sources tell TMZ, the likelihood is ... Katie will get the 3 PM time slot when the show debuts in September, 2012. That's the coveted slot Oprah owned for a quarter century in many key markets.

Matt Lauer will NOT be part of the show.

April Purvis, along with a man named Victor Clement, was busted by Floyd County Police in Georgia. According to the Rome News-Tribune, a traffic stop revealed less than an ounce of marijuana in the car ... and then, upon further inspection, methamphetamines were found in Purvis' purse.

Both were charged with a misdemeanor for the pot ... but Purvis was hit with a felony charge for the meth. The two are still in custody in Floyd County Jail.