US pop superstar Britney Spears has checked herself into rehab following her arrest last month on suspicion of driving while intoxicated near Los Angeles, US media reported on Sunday. The 44-year-old singer was arrested in early March and booked into custody by the Ventura County Sheriff’s Department on suspicion of DUI (driving under the influence). She was released soon after, and a representative for Spears at the time described the incident as “completely inexcusable” and said Spears would...