Lady Gaga: Patrizia Reggiani - House of Gucci

American-Italian pop royalty Lady Gaga took method acting to the extreme to play the "Black Widow" of haute couture in House of Gucci. Gaga famously stayed in a thick, melodramatic Italian accent for nine months straight, even when cameras stopped rolling. She completely threw herself into the psychological descent and wounded pride of the real-life socialite who hired a hitman to assassinate her fashion-empire heir ex-husband, Maurizio Gucci.