Children Services Investigate Mariah Carey

DCFS launched the investigation after someone complained Mariah drank a Guinness in the hospital after giving birth to her twins. We're told DCFS social workers will ask Mariah about the incident and interview others in the house as well.

The investigation is curious because hospital workers were closely monitoring Mariah and fully saw what was going on in her room. Sources tell us someone from the hospital told Mariah it would be beneficial to drink a dark beer -- like a Guinness -- to assist her in lactating.