I don't think they will release more than three singles, so the last one, they should choose wisely.
-"The Harold Song" is great, and like many of you had said, it will do something different for her, it would be very interesting watching her perform this song. People would see her softer side and a little more of her vocals.
-"Sleazy" is a smash waiting to happen, the same as "Cannibal", both of those songs are different from her other 5 (6 with "Blow") singles. Unlike "The Harold Song", these two can keep her Top 10 streak on BB, because even though THS is amazing, I think it would underperform a la "Thinking of You" because it's a ballad. I hope I'm wrong.
Anyways, "Blow" hasn't even take off yet, so let's enjoy this song and then pick the other single, if there is another one off course