Certainly, her debut performance of "Part Of Me" at the 54th GRAMMYs really did a good job for her, because Katy Perry is about to bring between 400k or 420k sold copies of her latest single in only one week!
Which let us to the conclusion that performing in the GRAMMYs guarantees some huge sales numbers for anyone, including Lady Gaga whose "Born This Way" performance last year helped her sell 428k copies of the single.
Although, maybe the positive message of the track and her whole divorce situation helped a little bit, right?
Anyways, congrats Katy! You totally deserve this one, since "Part of Me" happens to be one of the best singles you've released from the "Teenage Dream" era.
