“Once in a while, if I want to go out and have a mommy-daddy night with my husband, I am more than allowed to do that. I spend all day with my son. Everybody has an opinion and everybody sometimes wants to cause drama and be mean spirited. But it’s something that comes with what you do and I learned that very early on.”

As a new mother, singing star Christina Aguilera recently defended her right to keep late nights, but the pint-sized powerhouse’s penchant for partying has hit a low note with record producer hubby Jordan Bratman, a new tabloid report reveals. Xtina’s shameless attempts to resurrect her career since the January birth of son Max have left her marriage hanging by a thread, one insider claims.

“Jordan’s sick to death of her partying,” says a friend. “It’s causing a huge strain on their marriage. He’s at his wits’ end and he doesn’t know what to do.”

It was Christina’s forcefully flirting with a string of mysterious men…and at least one women…during a recent outing at LAX Nightclub that have Jordan crying foul:

“Christina was so smashed she started flirting with a couple of hot guys right in front of her husband,” an onlooker tells the Daily Mail. “She was whispering with one guy and rubbing up against another!”