"Can You Tell" by Ra Ra Riot- This song is upbeat and catchy. It's one of those songs that gets stuck in my head so once I hear it, I'm singing it all day.
*Update 4/26/11* I wrote this post last night and just re-read it. How short and boring and lame is this post. The answer is very short and boring and lame. I was tired and irritated because my wireless router is acting like a jerk. Plus, I wasn't feeling very inspired by the music challenge which is a problem that continues today.