In fact, the Las Vegas Convention and Visitors Authority's wildly successful "What Happens in Vegas Stays in Vegas!"

BBC: Las Vegas week

What happens in Vegas may stay in Vegas, but unfortunately, what goes in the stomach in Vegas does not always stay where it should.

BBC: Hangover help from a Las Vegas bus

Often typecast as the blonde ditz, Diaz also hit the big screen opposite Tinseltown goofball Ashton Kutcher in Twentieth Century Fox's spring comedy, What Happens in Vegas.

FORBES: Hollywood's Top-Earning Actresses

The only problem is that when it comes to the IRS, what happens in Vegas does not stay in Vegas: it may end up on a tax return.

FORBES: IRS OVDI Offers Penalty Relief for Dual Citizens

So what happens in Vegas reflects what's happening across America.

WHITEHOUSE: President Obama Addresses Business and Tourism Leaders

What happens in Vegas, stays in Vegas.

FORBES: Move up http://i.forbesimg.com t Move down