Why does America like crappy music?

I just visited Billboard.com and was appalled when I saw what the top 10 songs currently are. I have taken the time to listen to at least a little of each song on this list, unfortunately most were so bad I had to skip around to get the gist of what is pathetically, considered music.

Here are the top 10 songs according to the Billboard Charts, along with a small remark from me.

1. Rihanna feat. Jay-Z - Umbrella: This is the most popular song in the Nation, yet my ears began bleeding within the first 30 secs. I have never liked Jay-Z, so the fact his voice was hammered into my skull right at the start, may be the reason this song leaves such a bad taste in my mouth.
2. Shop Boyz - Party Like a Rockstar: I'm not a huge fan of rap, but do not dislike the genre in general. With that said, this song should not be the second most popular song right now. It isn't the worst thing I've ever heard and was even able to listen to the entire thing, however, it was far from anything I would listen to in public. The shame would be unbearable.
   
3. Plain White T's - Hey There Delilah: I actually like this song a lot and am proud to admit it currently has a nice home in my iPod. Personally, I feel this song should be number 1, not because it is that amazing, simply because it is better than anything else on this list.
4. Fergie - Big Girls Don't Cry: Blah... "I'm not gonna miss you, like a child needs his blanket." Enough said.
   
5. T-Pain Feat. Yung Joc - Buy U a Drank: The word is "drink," not drank... Their is a difference between artistic license and promoting the degradation of the English language. Oddly catching, yet still extremely horrible.
   
6. Timbaland - The Way I Are: I ain't got no money neither, but dat don't give me no rite to make crappy music and use badly English. Would it really detract from your song to title it, "The Way I Am," you stupid fuck...
   
7. Maroon 5- Makes Me Wonder: I've never really liked Maroon 5 and this is no different. Could they be bigger pussies? They sound like a 90's boy band in this track. On second thought, that isn't any different than anything else I have heard from them.
   
8. Avril Lavigne - Girlfriend: Aside from being mildly attractive, she is utter crap. On top of the song being horrible, she continues to dress punk, yet sings Pop. Pick a fucking genre already.
   
9. Justin Timberlake - Summer Love: This ex boy band member may be the worst thing to happen to music since Bob Dylan found Jesus (view his gospel songs on youtube, you will see what I mean.) Timberlake is like a white R. Kelly, minus the golden showers. This is absolutely horrible. I never thought I could hate him more than when he was a member of N'Sync, but alas, I have been proven wrong.
   
10. Amy Winehouse - Rhab: Surprisingly, I have nothing bad to say about this song. I actually kind of liked it.
    

How are these the most popular songs? What the hell is wrong with people? I can't believe so many people have such horrible taste in music. People make me sick... Out of ten slots, only 3 songs listed are even worthy of listening to.