Usher is seeking to share custody of the two sons he has with his estranged wife, stylist Tameka Foster. The R&B star officially filed for divorce from Tameka at Georgia's Fulton County Superior Court on June 12, after almost two years of marriage. The court papers confirm that the couple has been separated since July 2008, and the "Love in This Club" singer is also petitioning for joint custody of their children, Usher Raymond V, 18 months and Naviyd, six months, saying that they "are substantially dependent upon each party for support."