According to the beta hunters, Hollaback Girl by Gwen Stefani was supposed to be in the game, but it was deleted. And according to the very unreliable GTAWiki, it was supposed to be on The Vibe, but that doesn't make any sense since that's an R&B station, and Hollaback is a pop song. So, that makes me wonder, was there supposed to be a pop station on IV? Or perhaps R* didn't care about the different genre, and decided to throw the song in there, only to drop it entirely. They've done it before, Goodbye Horses(Would you f*ck me? I'd f*ck me)isn't really classic rock, but they included it in LRR either way.
Also, inb4 B Dawgy Dawg says "Who cares? That song is sh*t, it's good that they removed it." Or something like that.