Mariah Carey goes mommy mode

Mariah carey transformed from superstar to concerned parent real quick in Vegas after her son put a plastic bag over his head onstage.Carey’s back at Caesars Palace for a string of shows, and brought out her 7-year-old twins, Morroccan and  Monroe, while she belted out “Always Be My Baby.” The twins tossed gifts to Mariah’s fans … but things got a little scary when Moroccan dug deep into his plastic goodie bag.With her son putting the plastic bag over his head