British pop star Lily Allen has sacked her music management company, blaming them for her ban on entering America. The Smile hitmaker has parted ways with Empire months after she was forced to cancel an appearance at the MTV Video Music Awards in Las Vegas when her visa was revoked by authorities. A source tells British newspaper the Daily Mirror, "She is still fuming about the business with her visa being revoked. She felt it was her year to break America and blames her management for not getting it sorted." Empire refused to comment on Allen's decision but wished her luck for the future.