The members of English pop band One Direction are planning to throw a stag party for Zayn Malik, who is walking down the aisle soon. Malik, 21, is marrying his fiancee Perrie Edwards and his bandmates intend to have a party in the Sin City, reports femalefirst.co.uk.The band comprises of Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson.