Mexican Mayhem is a dog act consisting of Melanie and her Chihuahuas Twizzle and Tucker, who made it to the semi-finals of Series 5.
In their audition, the dogs performed through an agility course, however one of the dogs refused to go round the course. Despite this however they advanced onto the following round and later reached the Semi-Finals.
In the semi-final, the dogs once again performed through an agility course, however once again one of the dogs refused to go around the course. They were buzzed by Simon. They were eliminated by Public Vote in eighth place at their Semi-Finals end.