No offence... but Katy's performance was really boring... The outfit on her during the show is ugly and she only got to sing a few lines from the song.
This dress was disastrous, I'm sorry, but she has a large chest, she doesn't need all that crap on the top of the dress. My opinion, make it tank sleeves at the shoulder, and take away the slit and it would look a million times better.
Coco Rocha wore this dress (although a longer one) at the Met Gala 2013! I remember this because I'm a big fan of her. Although what I don't get is that Katy was there too, so why would she wear this?? Didn't she see Coco wearing this? I wonder if she knew Coco wore these too :o