Recess Easter Egg - No Doubt Logo

In the episode "Germ Warfare" and in the movie "Recess: School's Out" there's a kid wearing a shirt with the No Doubt (NxD) logo on it. I believe the kid has an unbuttoned shirt over it and is wearing sunglasses.

This is because one of the artists was No Doubt founder and Gwen Stefani's brother, Eric Stefani.

An example of the logo: http://www.yowzers.com/rrcrsmp.jpg

(The No Doubt version has the letters "ND" instead of "RR". In Recess, the shirt has no letters, just the logo)