The real loser of the whole Bad Blood situation is Gaga, not Katy.
Bad Blood, a song produced by Max Martin (you can't be a successful white popstar without him - if she'd been smart she would have snatched him up after TFM) with an event video (remember when Gaga had those?) directed by one of the top pop mv directors, Joseph Kahn (who never wants to work with Gaga again), and featuring Kendrick Lamar (who bumped Gaga off his album over 'creative differences' i.e. she was a pain in the ass).
Bad Blood is a big coulda woulda shoulda reminder that Gaga is over, and of why she is over.