The constant Juicy J dragging
All of Katy's achievements being highlighted
Juicy J's messy verse getting scalped line-by-line
The Russell Brand mention
"Lemme just say, I ****in' hate her. I don't know her personally, but if her music is any indication of what she's like as a person I want to uppercut her into the sun."
Still got that #1 though 
He's actually somewhat cute-ish. 
