Wish You Get Rich...
A common New Year saying, especially in the south of China, is "恭喜发财" or Gong Xi Fa Cai which means something to the effect of "Wish you get rich". In the West we usually hear it as "Gung Hey Fat Choi", which is actually the Cantonese version.
Here's a music video by Andy Lau, sung in Mandarin, which I've seen on the local buses a few times since I've returned. I don't claim that it's a great music video, just interesting to watch this time of year.
After you've heard it once, you can click on this link to try the KTV (karaoke) version of the song.