I had a few songs that I want to see released and for whatever reason, whenever I make the suggestions the way that Harmonix asks, I get a bounce back email, stating they they did not get it. So, I'm just going to make my suggestions here in hopes that others will agree with me and add their suggestions too.
Play that funky music (White Cherry)
Cotton Eye Joe (Rednex)
Drive by (Train)
Payphone (Maroon 5)
There are plenty more suggestions that I'd like to make, but I'm using the work computer right now and this is all I can think of off the top of my head.