Avril Lavigne Got Milk ad?

This was posted many times in the other sub but I haven’t seen it on this one. I’m mainly wondering if this was ever figured out? It’s weird that you can’t find the original picture anywhere. Is it just lost media?

I did come across a picture someone posted but it wasn’t her in the same outfit that so many remember. Suspenders and a guitar are two things I strongly remember. Why is this so engraved in my memory? I’m almost positive this ad was hanging in school cafeterias and was frequently shown in magazines.