This is the new Wii Fit commercial playing on TV in North America right now. It has the most addictive song playing on it and I couldn't get it out of my head until I found it. I went to Adtunes.com, a great website to find music from any media source like commercials, videogames, TV shows, etc. and found out the name of the band is Friendly Fire and the song is On Board.
Find it at Amazon.com