All Dressed Up For School - who sings

[mikeyj]

the part that goes "She's so fine, what a turn on"? I'm not 100% certain who it is

[John]

Brian, isn't it?

[Brian65]

Yes it is Brian, the proof is on the Bonus disc in The Capitol 2008 Singles Collection.

After Graduation Day ends there is some silence then a hidden track plays.
That hidden track is from a All Dressed Up For School Vocal Session.
In the session you can hear Brian Rehearsing that line, "She's So Fine" a couple of times then he says I'm going to do that.

[Chris Brown]

Totally Brian.