Eminem’s ex-wife Kimberly Mathers was arrested in an Ann Arbor, Michigan hotel, two months after a felony warrant was issued when she failed to return to a drug treatment facilty.Mathers pleaded guilty to cocaine possession in January. She was sentenced to 30 days in a county jail and ordered to attend in-patient drug treatment for 90 days.The arrest warrant was issued in April, when she failed to return.Acting on a tip, police went to Weber’s Inn and saw a woman that resembled the 28-year-old Mathers.When officers asked her name, Mathers allegedly told the police “Julie” and refused to let them enter her room.Mathers eventually granted the officers entrance and admitted her identity.Mathers was turned over to officials in Macomb, County, Michigan.