LeAnn Rimes is throwing it back to -- with help from Katharine McPhee.The singer and actress in a special cameo on her husband Eddie Cibrian's new Netflix sitcom, and only ET premieres the exclusive sneak peek at Rimes' musically-inclined guest appearance.follows Bailey (McPhee), an aspiring young country singer whose career and personal life suddenly gets derailed, and finds herself taking a job as a nanny for a rugged cowboy widower Beau (Cibrian) and his five children.