A source tells PEOPLE that she's focused on her career and excited to move on from Marc Anthony

By Sara Hammel K.C. Baker
August 05, 2011 05:30 PM
GSI Media

While Jennifer Lopez and Marc Anthony called their split “painful,” Lopez is at peace with the couple’s decision to end their marriage of seven years, a source tells PEOPLE.

“She is very relieved to be out of [the marriage], frankly,” says a source close to the singer, who recently celebrated her 42nd birthday. “I don’t think she is sitting around crying or wondering if she made the wrong decision.”

Instead Lopez – who is currently with her 3-year-old twins Max and Emme in Atlanta where she’s shooting the movie What to Expect When You’re Expecting – is focused on work. “For her, it’s back to business,” the source says. “She is all about her career. She’s excited to move on.”

PHOTOS: Jennifer & Marc’s Picture-Perfect Family

Speaking of Lopez’s career, another source told PEOPLE last month that she is "very close" to signing on for a second season as a judge on American Idol.

On Friday, Idol executive producer Cecile Frot-Coutaz told reporters that negotiations are on track.

“Look, we are not worried,” she said of Lopez’s Idol deal. “The contract hasn’t been signed yet, but she’ll be back.”