I'm no fan of Katy Perry but, as I understand it, her and her label were well aware any songs from the re-release would not count towards the total, she is just trying to milk the album for all its worth financially rather than for breaking records. I have to admit it seems a bit much re-releasing the album so long after it was first released, maybe Billboard have put a time limit on re-releases?

I didn't think features counted towards a star's total No 1's, that doesn't sound right to me as its not their song - it belongs to the person who is the main artist. Nor should remixes - or any artist could just keep releasing remixes and, if they are good enough (which is rare, most remixes are crap compared to the original song), keep on upping their sales figures for the original track.

I have no idea why people put so much store in Billboard charts anyway, their weird-ass formula which includes a large percentage of the rating being dedicated to airplay is no real indicator of the only figure that matters - SALES!