It took me a while to track down the title/artist of this first song. I heard it on the radio a few times before I could pick out enough lyrics (and remember them more than 20 minutes) to google it. I love the funky beat and the spirit behind the whole song.
Michael Franti & Spearhead : Say Hey
The way that the lyrics are simple yet complex and syncopated just makes me want to listen to this one over and over.
Owl City - Fireflies (embedding disabled)