The device on Cat Valentine's (played by Ariana Grande) belt is a Marshall MS-2 guitar amplifier with the 'Marshall'-logo removed. It's not turned on or even suitable for speech amplification.
The Raisin Bran box that Tori carries around in this episode has the name Schneider's. Dan Schneider is one of the producers of the show.
The order in which Sikowitz tells the group who is picking whose character is the same order in which they announce the characters.
The season finale of season one.