Jennifer Lopez introduces new boyfriend to costars

Jennifer Lopez has introduced her new boyfriend to her American Idol costars. The singer — who split from husband Marc Anthony in July after seven years of marriage — showed she is getting serious about her latest love, dancer Casper Smart, by inviting fellow judges Randy Jackson and Steven Tyler and the show’s host Ryan Seacrest for dinner with them in Las Vegas after taping an episode.

“[They were] dining on Kobe steak and yellowtail jalapeno, along with a bottle of Caymus Cabernet,” a source said.

“Jennifer and Casper cuddled up next to one another, exchanging a few small kisses during the dinner. They were all very sweet.”

Marc is sure to be unhappy with the development as it was recently revealed he is set to challenge Jennifer for custody of their twins, three-year-old Max and Emme after he “hit the roof” when he saw pictures of Casper bonding with the youngsters.

“It caused a huge blow-up. [Now he is] going back on his word and saying his wants joint custody,” a source said.

Those close to the situation insist Marc’s motivation to take action is to make the On the Floor hitmaker “suffer” because he is angry she has found love again.

“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 said.

However, the singer-and-actress is not prepared to give in to her estranged spouse and is ready to fight him to keep the custody arrangements as they are.

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