For me, it's Rated R and The Fame Monster.
A sound that no artist could really do minus Rihanna in such a dark time in her life. Every song (minus that horrid Photographs) is at least one of the following: an epic bop, a masterpiece that oozes emotion, or the dark pop that artists need to attempt to emulate more often.
The Fame Monster is eight tracks of pop perfection. It was Gaga at her prime, and a Gaga that I hope to see in ARTPOP from start to finish. It holds such a fresh sound and yet sounds almost retro at the same time.
