He may or may not be headed to American Idol.
But Adam Lambert is definitely on his way to Rosewood.
The singer himself just confirmed via Twitter that he will guest star later this year on Pretty Little Liars, with an ABC Family source reporting the artist will "appear in a scene with Lucy Hale" and also perform a pair of singles.
Lambert has been booked for this year's Halloween special, which - similar to the one on Pretty Little Liars Season 2 - will air as a unique standalone installment.
What do you think of this unexpected casting news?