It looks like it's all over for Gwen Stefani and her rocker husband Gavin Rossdale. The couple, who have been married for almost 13 years and have three sons together, have filed for divorce. In a joint statement the superstar couple said: 'While the two of us have come to the mutual decision that we will no longer be partners in marriage, we remain partners in parenthood and are committed to jointly raising our three sons in a happy and healthy environment.' According to TMZ, Gwen stated irreconcilable differences as her grounds for divorce. It also stayed that the two stars did not sign a prenuptial agreement before they married back in 2002 and that Gwen is not planning on providing The Bush front man with any spousal maintenance.