Los Angeles - LeAnn Rimes is "worried" husband Eddie Cibrian is cheating on her.
The Can't Fight the Moonlight hitmaker - who checked into rehab to deal with "anxiety and stress" late last month, one day after her 30th birthday - has reportedly got "major insecurity issues".
She is also feeling "stressed" about still being branded a home-wrecker for embarking on a relationship with Eddie in 2009 while she was married to chef Dean Sheremet and he was wed to Brandi Glanville.
A friend of the couple told Us Weekly magazine: "LeAnn has had major insecurity issues since she first got together with Eddie.
"She's been stressed about always being called a home-wrecker and also worried that Eddie is cheating on her. She's been on a downward spiral."
'Wishing her all the best'
But LeAnn has surprisingly gained support from Brandi - who Eddie eventually left to be with the 30-year-old singer in 2009 after they met on the set of TV movie Northern Lights - who hopes her former love rival finds "what she is looking for" in the 30-day in-patient facility.
Brandi - who has two sons, Mason, nine, and five-year-old Jake, with Eddie - said: "I totally support LeAnn's decision to enter rehab - my top priority is my children, and at the end of the day we are a family.
"LeAnn is their stepmom, and they love her. I am wishing her all the best and I hope she will find what she is looking for while in rehab."
The Can't Fight the Moonlight hitmaker - who checked into rehab to deal with "anxiety and stress" late last month, one day after her 30th birthday - has reportedly got "major insecurity issues".
She is also feeling "stressed" about still being branded a home-wrecker for embarking on a relationship with Eddie in 2009 while she was married to chef Dean Sheremet and he was wed to Brandi Glanville.
A friend of the couple told Us Weekly magazine: "LeAnn has had major insecurity issues since she first got together with Eddie.
"She's been stressed about always being called a home-wrecker and also worried that Eddie is cheating on her. She's been on a downward spiral."
'Wishing her all the best'
But LeAnn has surprisingly gained support from Brandi - who Eddie eventually left to be with the 30-year-old singer in 2009 after they met on the set of TV movie Northern Lights - who hopes her former love rival finds "what she is looking for" in the 30-day in-patient facility.
Brandi - who has two sons, Mason, nine, and five-year-old Jake, with Eddie - said: "I totally support LeAnn's decision to enter rehab - my top priority is my children, and at the end of the day we are a family.
"LeAnn is their stepmom, and they love her. I am wishing her all the best and I hope she will find what she is looking for while in rehab."