Floyd Mayweather likes to party big, bet big, and hang out with Hollywood celebs. The one thing the boxing legend apparently doesn't like doing is paying his taxes, RadarOnline.com has learned.

The IRS has just body slammed the undefeated boxer with a $3.4 million bill, reports the Detroit News who discovered that the lien was for unpaid 2009 federal income taxes.

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This isn't Mayweather's first time in the ring with the IRS. In 2008, he was hit with a $6.1 million tax bill. He worked out a payment plan with the feds for that one.

Mayweather, who goes by the nickname Money, tweeted and did a radio interview last month about winning $37,000 on a Chicago Bulls game (it was a legal bet in Vegas). Hopefully he'll remember to report that when he does his 2011 taxes.

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His marriage only lasted a month, he's just been indicted for a massive gambling debt, and now RadarOnline.com has uncovered a six figure tax lien against Joe Francis' company, Mantra Films.

Mantra is the parent company for Francis' Girls Gone Wild empire, and on November 29, the IRS filed a tax lien against it in the amount of $113,128.

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The lien is against unpaid taxes from 2003.

Francis was indicted by the state of Nevada on Feb. 2 on two felony theft charges in connection with the $2 million he owes the Wynn Casino.  The casino had previously won a $2.5 million civil judgment against Joe, but he's only coughed up $500,000, so now it's a criminal case.

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And in December, RadarOnline.com broke the news that the soft porn millionaire's marriage to Christina McLarty was over after just one month.

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Battling her January 5 DUI bust isn't Jaime Pressly's only legal problem, RadarOnline.com has learned.

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The My Name Is Earl star, who is married to entertainment attorney Simran Singh, is in arrears to the tune of just over $637,000 in Federal and state taxes.

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That's according to public records uncovered by The Detroit News.

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Here's the break-down.  The IRS filed a $260,370 tax lien filed against her on December 6.

This was on top of the $281,699 lien the IRS had filed against her September 8, which was for 2008 income taxes.

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And just to round things out, another lien was filed against her by the State of California in the amount of $95,080.  That went on the books June 21.

Jaime was more than twice the legal limit the night she was arrested for DUI.  She is out on $15,000 bail.

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Gordon Ramsay, the embattled TV chef and restaurateur, has nearly $1 million in tax liens against him, RadarOnline.com has learned exclusively.

According to court documents we uncovered, there are two outstanding New York State tax warrants against Ramsay. The latest one was filed last month and is for a whopping $419,051.

Back in July, another warrant was filed for $513,003. That's $932,054 if you want an exact count, as we're sure Ramsay's creditors do.

Chef Ramsay's company suffered financial setbacks in the last two years as the recession hit his rapidly expanding restaurant empire and he fired his CEO father-in-law in a bitter family feud.

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