Another one bites the dust!

Marc Anthony has called it quits with his Venezuelan model girlfriend Shannon de Lima, his rep confirms to E! News.

The couple, who had been dating a little more than a year, gave no reason for their breakup. This was the Latin singer's first major relationship since his split with ex-wife Jennifer Lopez.

Don't count on a reconciliation, though!

J.Lo is happily in love with boyfriend Casper Smart, who has been a constant companion of the former American Idol judge since they revealed their relationship last year.

We doubt Mr. Anthony will have trouble finding another sweetie!

His ex-wife may be completely enamored with boy toy Casper Smart, but that's all water under the bridge for Marc Anthony!

The Latin singer was all smiles in Miami on Thursday afternoon, where he's currently rehearsing for his 16-city "Gigant3s" tour, along with Chayanne and Marco Antonio Solis, which kicks off at the American Airlines Arena in Miami tonight.

Meanwhile, La Lopez kicked off her own summer tour last month with Enrique Iglesias, which will play 13 dates in the US before it's extended overseas. The sexy Latina Tweeted after her concert Thursday: "Good morning everybody!! Just left Minneapolis now off to Chicago!! Hope you are all having an amazing day... #LOVE!"

After Marc Anthony and Jennifer Lopez announced their split last July, the Latin crooner has taken the next step and filed for divorce, according to TMZ.

The documents were filed on Monday in Los Angeles County Superior Court, and Anthony is asking for joint legal and physical custody of the couple's 4-year-old twins, Max and Emme. The Latin crooner cites "irreconcilable differences" as the reason for their split, and wants each party to pay for their own legal fees. Additionally, he is asking the court to deny J. Lo spousal support if she asks for it.

Though the couple have both started new romances (J. Lo has been dating 24-year-old dancer Casper Smart, while Anthony has moved on with Venezuelan model Shannon de Lima), they have been keeping things civil for their children and for their show, Q'VIVA! The Chosen.

Marc Anthony has officially moved on from soon-to-be ex-wife Jennifer Lopez!

The Latin singer is currently dating model Shannon De Lima, and he went public with the news via Twitter, in a message translated into English:

"To Shannon, my status of liberty. Kisses baby!"

Anthony also re-Tweeted a supportive message from his son Chase:

"To all my followers and all Twitter peeps, follow the best couple of 2012 and for many for years Marc Anthony and Shannon De Lima!"

Meanwhile, Ms. Lopez has long since moved on with 24-year-old backup dancer, Casper Smart. The pair have been spotted enjoying lavish shopping sprees in jewelry shops, and jetting off on vacations aboard Jen's private plane.

The "I'm Into You" singer even lets her new man get behind the wheel of her Bentley, despite the fact that he was recently sentenced to one year probation and ordered to pay a $500 fine for speeding. Looks like Jenny's in love!

While his estranged wifey Jennifer Lopez has been running around town with her young boyfriend Casper Smart, Marc Anthony has been hanging solo at a Beverly Hills hotel.

The father of two, looking quite thin, is reportedly furious over JLo's new relationship ... especially the fact that Smart has been bonding with his twins, Max and Emme.

But don't feel too bad for Mr. Anthony. The Latin crooner is dating young Mexican model Adriana Ontiveros, according to Life & Style.

All's fair in love and war.

Jennifer Lopez and Marc Anthony called it quits in July ... and at the time it seemed civilized, but now the two are at war due to JLo's new relationship with 24-year-old backup dancer Casper Smart, according to Us.

A source close to Lopez, 42, and Anthony, 43, tells the mag that the Latin crooner "hit the roof" after seeing photos of Smart playing in Hawaii over the Thanksgiving holiday with the couple's 3-year-old twins, Max and Emme.

"He wants to make Jennifer suffer because she's having fun with someone new, and he knows this will hurt her on the deepest level," the source adds.

Although the couple have already settle custody arrangements, Anthony may go "back on his word."

As for Lopez and Smart, we caught them shopping together at a jewelry store in Calabasas earlier this week. Sounds like it's getting serious!

Muy caliente!

She may have totally moved on with a new man, but Jennifer Lopez only had eyes for ex-hubby Marc Anthony in this just-released teaser for their upcoming talent competition show, Q'Viva: The Chosen.

The former pair announced their split in July, but reunited for a joint reality TV production that really shows off their chemistry -- JLo is even seen doing a sexy dance for Marc!

The teaser features the ex-couple's trip to Puerto Rico, where they work side-by-side to discover authentic Latin American talent. Lopez proudly exclaims in the clip: "I am Latina and this is who we are. Isn't it fabulous? Isn't it amazing? Doesn't it bring tears to your eyes and make you want to smile and dance and jump and stay up all night?"

The series will debut in Spanish on January 28 on Univision, an English network has not yet been announced.

Marc Anthony celebrated his 43rd birthday at Miami's Viceroy Club 50 last night, and the Latin crooner invited 150 of his closest friends, including Joel and Benji Madden! Marc posed for pictures with his daughter Ariana, and sources at the party observed that rather than flirting with the ladies, he was focused on having a good time with his friends.

Jennifer Lopez's ex-husband had just come off the stage at his sold-out concert at the American Airlines Arena, and since he's set to perform again tonight, he ended up leaving the party around 1:15am. And get this -- Marc was moved to tears earlier in the evening ... click after the jump to find out what made him so emotional!