Wow, thing's are getting pretty heated, huh? Remember, music is subjective. You express your opinion, value other people's opinions, and move on. It's not that serious. 😛 As far as my generation, generation Y, I would consider Britney Spears. Like her or not, she's iconic. She was my entry into the music world, believe it or not. She's extremely influential, especially in her prime. Because let's face it, music changed as soon as she stepped on the scene. (For better or for worse, that's up to you.) Sure, my musical taste have changed drastically since I was a young grasshopper, but I wouldn't have had some of my most precious memories if it wasn't for her.
So, I may have Pink Floyd, and Rolling Stones, and Zeppelin all on my Ipod, but scroll upward to the B section and you'll find Ms. Spears. Why? Because I can. 😉