When you’re rich and famous — but not careful about paying your income taxes, in full and on time — it’s easy to wind up a target of the IRS or state tax agencies.

Even celebrities find themselves on Uncle Sam’s radar when it comes to unpaid or owed taxes. The folks shown here are in their mid-40s or older, so they’re at a point in their lives when they likely planned to be on financial “Easy Street” — rather than sweating about overdue taxes and dealing with big money problems.

— Jeff Kravitz/FilmMagic/Getty

Ozzy and Sharon Osbourne

In 2011, it was revealed that Ozzy, now 64, and Sharon, 60, owed the IRS more than $2 million. The rocking duo had $357,071 in unpaid taxes from 2007, along with a tax bill of $718,948 from 2008 and $1.024 million in overdue taxes from 2009. The IRS put a tax lien on their home, but the home was never seized. Since then, the Osbournes have knocked down at least $700,000 of their tax debt. Sharon has also suggested that they’re watching their finances more closely — instead of relying on accountants and money managers.

— Brian J. Ritchie/Rex Features/AP

Dionne Warwick

The singer filed for bankruptcy protection in March 2013, telling a court she owed $10.7 million in federal and state taxes that she simply could not pay. Warwick’s IRS troubles have been well documented and go back to the 1990s. With her Chapter 7 bankruptcy filing, the 72-year-old performer hopes to put her tax woes behind her once and for all.

— Chris Jackson/Getty Images

Pamela Anderson

The former Baywatch beauty has struggled with tax problems for years. In December 2012, both the IRS and California authorities hit Anderson with two tax liens totaling more than $370,000. Anderson, 45, owes the feds $259,396 for unpaid taxes in 2011. She’s also facing a $112,119 tax lien from the Golden State for unpaid taxes for the same year.

— Luca Teuchmann/WireImage/Getty Images

Nicolas Cage

After teetering on the brink of financial ruin, and owing the IRS a whopping $14 million in taxes, Cage says he has settled down and is rebuilding his financial life in Sin City. In March 2013, the actor, who will turn 50 in January 2014, appeared on the Today show and said he now has “a simple life” in Las Vegas with his wife and young son. Last April, Cage paid $600,000 toward his tax debt, leaving him with about $6 million in taxes still outstanding.

Next page: Which famous golfer got in the hot seat with the IRS? »