"She is very relieved to be out (of the marriage)," the source told People. "I don't think she is sitting around crying or making the wrong decision."
Lopez has been in Atlanta filming "What to Expect When You're Expecting" and is also apparently close to signing up for a second season as a judge on "American Idol," People said.
The Hollywood Reporter said J-Lo also is committed to co-starring with Nick Nolte and Jason Statham in "Parker," which will be released in October 2012.
"She is all about her career," the source told People. "She's excited to move on."