Moon Zappa, daughter of the late singer/songwriter Frank Zappa, has applied for a restraining order against a man who allegedly threatened her life, according to the Associated Press. Zappa, 33, sought the temporary restraining order against Mark Brownfield, who pleaded innocent last month to making death threats against her. Brownfield claimed Zappa and her late father stole the lyrics of the 1982 hit song "Valley Girl" (like, Omigod!) from Brownfield. He was confined to a psychiatric ward in a federal detention center after he allegedly told Zappa he was going to kill her in a letter mailed to the FBI. At the time, a defense lawyer told a judge Brownfield had been diagnosed with paranoid schizophrenia and depression. Zappa asked that the restraining be extended to include her mother, sister, two brothers and a male friend.