LOS ANGELES (Reuters) - Country singer LeAnn Rimes has entered treatment for anxiety and stress, but is not seeking help for an eating disorder or substance abuse, her spokesman said on Thursday. Rimes, whose affair with "CSI: Miami" actor Eddie Cibrian while both were married to others caused a scandal three years ago, checked into an unidentified treatment center on Wednesday - the day after her 30th birthday. "LeAnn has voluntarily entered a 30-day in-patient treatment facility to cope with anxiety and stress," her publicist Marcel Pariseau said in a statement to People magazine. ...