By Breaking Celebrity News Staff

LeAnn Rimes posed on the premiere of Batman Live in Los Angeles with husband Eddie Cibrian and his two sons Thursday, the first time she's been at a show business event since taking a break from her stay at an in-patient treatment facility to deal with anxiety and stress issues.

LeAnn, 30, and Eddie, 39, dressed perfectly for the occasion -- both clad in all-black outfits -- alongside his sons Mason, 9, and Jake, 5.  The embattled singer tweeted she was "channeling my inner Cat Woman" prior to the outing.

LeAnn is on a pre-planned hiatus from the facility to fulfill a number of professional obligations, such as concerts, she made prior to checking in.

As we previously reported, Rimes entered treatment late last month following a s