LeAnn Rimes has reignited her feud with her husband, Eddie Cibrian’s ex-wife Brandi Glanville by slamming her on Twitter for keeping her stepson's hospitalization from Cibrian.

The Real Housewives of Beverly Hills star and Cibrian’s son, Mason, 10, was hospitalized in New York City on Saturday for unknown reasons.

Rimes tweeted, “Got a text from a friend at 4:30am asking if mason was ok. THANK GOD! Mason just called Eddie himself!!”

Meanwhile, Glanville took to Twitter to post a picture of her son in the hospital bed at Mount Sinai St. Luke's hospital.

Rimes, however, continued to tweet about not knowing anything about Mason’s condition. "It's been a panicked morning not knowing anything and Mason being all the way across the U.S. Relived to know he's ok,” she wrote.

She also revealed Cibrian had blocked Glanville’s number, so that’s likely why she couldn’t contact him to tell him about their son.

The singer said he did it because he would "get horrible, evil texts at all hrs of the night." But continuing to slam Glanville, she said, "He unblocked his number & called her at least 5 times and Mason has a cell.”