Cantor will attend the scene with actress Lucy Hale
Adam Lambert will make a cameo in the series Pretty Little Liars.
According to the site's host Ryan Seacrest, the singer of "Never Close Our Eyes" will be special Halloween production in Brazil transmitted by the channel Boomerang.
Lambert must participate in a scene with actress Lucy Hale, who plays Aria Montgomery, and sing two songs. The recordings of the episode should begin next week.
Until August 28, when starting the summer break, the ABC Family Channel original unpublished chapters should display. After the Halloween special in October, the series will return only in January 2013.
Currently, the runner-up of American Idol is on tour with members of the Queen.