Sega is going social with its promotions for Puyo Puyo!!, the DS title that serves as the 20th anniversary game for the series.
I believe the gameplay videos at the YouTube site are old, but there is a clip with that god awful Puyo Puyo theme song, which I've pasted here:
Hey, it's not that bad actually! Puyo Puyo, Puyo Puyo, Pu-pu-pu-pu Puyo Puyo!