Sha Shewakar
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The Twins Effect, also known as Vampire Effect in the United States, is a 2003 Hong Kong martial arts comedy-horror film directed by Dante Lam and Donnie Yen. The film was derived from Cantopop group Twins, starring both members Charlene Choi and Gillian Chung in the leading roles. Co-stars include Edison Chen and Ekin Cheng. Jackie Chan makes a cameo appearance as an ambulance driver.

Following its release on 8 March 2003, The Twins Effect was a box-office success in Hong Kong, became the highest grossing domestic film of the year. The film gained huge popularity, mainly from fans of the Cantopop group Twins.