Bad Bridesmaid (2014)

Brides-to-be go on a Hen's weekend with their bridesmaids when one of them is secretly an actor set to make havoc. If the bride-to-be manages to convince her friends that the bridesmaid is who she says she is and passes tests that the bad bridesmaid throws at them the bride-to-be will win a dream honeymoon while each of the bridesmaids will get a spa weekend each.