Britney Spears is said to be "really upset" after having her child visitation rights suspended by a judge on Wednesday.

The singer was told by Los Angeles County Commissioner Scott Gordon she would not be able to see her two kids with ex-husband Kevin Federline after failing to provide the court with the correct contact information, although Britney claimed she had merely been suffering from bad reception.

A source tells E! Online, "She's really upset. She keeps saying: 'I can't believe this is happening.' It's like she just can't accept what's happened."

However, according to Federline's lawyer Mark Vincent Kaplan expects Britney to have her rights reinstated by the end of the month.

"She has complied with the part of the order (causing the suspension). I expect that visitation will be reinstated," he says.