Defining a Generation

Monday's class we discussed everything from what makes 'Emerging Adulthood' a valid theory to why it is so difficult to accept it as an actual 'stage of development'. However, the thing that for some reason stayed with me from the class was the slide about the Millennial Generation stereotypes with the picture of 'Mean Girls' and Taylor Swift.
I was really taken aback that these are seen as 'defining' of our generation. And even though I felt a little better when I saw that most of the class felt the same way as me, when they were given the chance to say who they thought were more appropriate 'definers' they started saying things like Britney Spears.
This stuck with me because of the fact that I couldn't think of anything better and I really do not like Britney Spears or (mostly) any kind of pop, and it kind of scares me that this is what people will look back on when they remember our generation. I discussed this with my girlfriend and everything that she said also had something to do with 'pop': Boy bands (N' Sync, Backstreet Boys), Beyoncé, Justin Timberlake, etc.
As we further discussed we realized that maybe something totally different like dubstep could be considered part of our generation because even though it's a new thing it is completely going to be remembered as being part of the 2000's, electronic music and shows like The Simpsons, South Park, Friends, etc. are things that make me feel that our generation has contributed much more than flashy pop stars and empty performances.
I guess I'm just bitter because I wish I could call The Beatles and Radiohead part of my generation :).