Dance Floor Anthem - Good Charlotte
Good Charlotte in general is a pretty great band, but this song is one of their best. It's got an irresistable beat, irresistable lyrics, and just makes you feel good.
Bad Day - Daniel Powter
This song cheers me up every time I'm upset, without fail. Enough said.
Do You Know? (The Ping Pong Song) - Enrique Iglesias
So the lyrics don't make a whole lot of sense, nor are they exceptionally original... but this song is worth a listen (or three) just for the ping-pongs. Seriously, I laugh every time I hear this song.