![toofunny3](http://img.photobucket.com/albums/v232/korn0818/ATRL_Smilies_All/faces/toofunny3_zps08814413.gif)
Covering his ass by claiming the good version shown on TV is autotuned in case it turns out she nailed the performance, I see.
Yesterday is a slow song that she performed Acoustically, I don't need to know anything else to know that she absolutely nailed it and it'll be a fantastic performance. I can't think of a single vocally bad Katy Perry acoustic performance.