Britney Spears has been granted an emergency restraining order against her ex-husband, Jason Allen Alexander, after Alexander gatecrashed the pop star’s wedding at her house in California last week.Alexander, who Spears wed during a Las Vegas ceremony in 2004 – before the marriage was annulled 55 hours later – broke into the premises on June 9, prior to the ceremony beginning. “Where’s Britney?… I’m here to crash the wedding,” Alexander said, referring to Spears as his “first and only wife”.The Ventura County Sheriff’s Office were dispatched to investigate a trespassing complaint, and Alexander was arrested on an outstanding warrant.