LeAnn Rimes is not a happy camper!

The singer was furious when husband Eddie Cibrian wasn't notified by his ex wife, Brandi Glanville, didn't contact him immediately notifying that the former couple's son Mason was in the hospital.

The soon-to-be reality star, "Got a text from a friend at 4:30am asking if mason was ok. THANK GOD! Mason just called Eddie himself!!"

She went on, "It's been a panicked morning not knowing anything and mason being all the way across the US. Relived to know he's ok."

Over the weekend, the 10-year-old was rushed to the ER by ambulance after falling ill in New York. News of the illness hit when the mom tweeted a photo of her son's arm hooked up to monitors and an IV drip while at Mount Sinai St. Luke's hospital.

Although the Real Housewife says that Mason is on the mend, it looks as if things were pretty serious at one point. Eddie's ex thanked the staff for saving "my babes life."

Brandi also wrote, "8 hours in the ER this trip to NYC Mason will never forget! 1st trip in an ambulance! All will be fine."

Understandably LeAnn was pretty shaken, however the "Blue" singer admitted on Twitter that Eddie had blocked Brandi's number but she defended his actions, saying, "get horrible, evil texts at all hrs of the night and maybe you'd think differently god bless you.'

Apparently the blocking situation has been resolved. "He unblocked his number & called her at least 5 times and mason has a cell," wrote LeAnn.

Well that's good to hear!