TONIGHT, LAS VEGAS gets a new slogan: What happens in 2013, stays in 2013.

Sin City, where the economy is built on gambling, sex and entertainment, is going all out to sell itself as a New Year's destination - even if drunken debauchery is the norm there every night.

With New Year's Eve falling on a Tuesday, many casinos offered up special "New Year's Eve Eve" events yesterday and advertised the two days before that as the biggest weekend of the year.

Today, casinos will start the revelry as early as possible. At Mandalay Bay, the Minus5 Ice Bar will start handing out free champagne for hourly toasts at 11 a.m.

More than 330,000 tourists are expected - so many that police will shut down the Strip to motorists so pedestrians have more surface area to puke and pass out.

Could this be the most awesome "CSI" episode ever?

John Legend is performing at Haze nightclub at Aria, Ne-Yo is at Pure at Caesars Palace and Maroon 5 is at Mandalay Bay. Bruno Mars is christening the Cosmopolitan's new Chelsea Ballroom. The show will be broadcast live on the casino's 65-foot marquee to ice skaters at a rooftop rink and partyers on the Strip below.

Other casinos are touting pricey nightclub bashes with $3,000 bottle service and open bars hosted by reality-TV and music celebrities, including Paris Hilton.

OMG! You mean we could party with Paris and we're stuck here? Bummer.

Those looking for a less costly night can head to downtown Vegas, where the Fremont Street Experience pedestrian mall is hosting a block party with acts including Blues Traveler and Papa Roach.

Virtual fireworks will light up the mall's blocks-long metal canopy, which boasts the world's largest video screen.

There will also be real fireworks - more than eight minutes worth shot from the rooftops of seven hotel-casinos.

And Wednesday? There will be plenty of hangover buffet options.

TATTBITS

* "Good Morning America" co-host Robin Roberts came out Sunday and the world shrugged.

Roberts thanked her longtime girlfriend, Amber Laign, in a year-end post published on the ABC News anchor's Facebook page.

The message, which follows Roberts' battle with a life-threatening illness, is the first time the "GMA" anchor has publicly acknowledged her 10-year relationship with Laign, a massage therapist from the San Francisco Bay Area.

* "Call Me Maybe" singer Carly Rae Jepsen will take over the role of "Rodgers & Hammerstein's Cinderella" on Broadway starting Feb. 4 for 12 weeks. She'll take over from Tony Award nominee Laura Osnes.

Jepsen began performing in musical theater in high school. She'll join the cast alongside Fran Drescher, who plays Cinderella's evil stepmother.

* Speaking of Broadway, the tourists have spoken and the No. 1 show on the Great White Way in 2013 was . . .

"The Lion King."

The Elton John/Tim Rice musical, celebrating its Sweet 16 this year, took in $97 million.

The 10-year-old "Wicked" earned a staggering $3.2 million over nine performances for the week ending Sunday, the first time a show has ever crossed the $3 million mark in a single week.

Several other shows - including current Tony winner "Kinky Boots," the 2011 Tony winner "The Book of Mormon," "Pippin," "Betrayal" and "Chicago" - all finished 2013 with box office records.

* Country music star Toby Keith is about as American as apple pie, so it's with a certain amount of surprise that Tattle has learned Keith's restaurant chain "Toby Keith's I Love This Bar & Grill" is under fire, ahem, at its Virginia location.

Why? The restaurant has instituted a "no guns" policy.

It's legal to dine in Virginia packing more heat than is in the eatery's Chipotle Habanero Pepper Sauce, but after talking it over with its insurance company and state officials, the restaurant has decided that whiskey, wings and Winchesters may not be the best mix.

Gun-holders are, of course, outraged.

"I'm not into boycotts," someone posted to the restaurant's Facebook page, according to the Washington Times. "I just don't want to be in a place where the only ones armed are criminals looking for a convenient concentration of helpless victims."

Is that how Virginians view going out to eat - publicly chowing down with criminals and "a convenient concentration of helpless victims"?

That's a little scary. Especially since Tattle is having dinner in Fairfax, Va., later this week.

In the meantime, however, Happy New Year! Here's hoping for a 2014 in which you can enjoy repeated meals out with family, friends and colleagues and not get shot.

- Daily News wire services contributed to this report.

Email: gensleh@phillynews.com

Phone: 215-854-5678

Twitter: @DNTattle