Google Inside AdWords crew posted classic songs that's sure to become a holiday classic, The 12 Days of AdWords Christmas.

The 12 Days of AdWords Christmas (download the mp3)
On the twelfth day of Christmas, Inside AdWords gave to me:
12 Help Center Helpings
11 Seminar Updates
10 Beta Test Invites
9 Impressions Tippings
8 Checkout Reportings
7 Tips for Searching
6 System Updates
5 Haaaaaaaaaaand Turkeys
4 Tools for SMBs (Part 1 and Part 2)
3 Reporting Tips
2 Trademark Policies (Part 1 and Part 2)
And Advice to Improve Ads Quality!”
The crew has also posted their latest holiday doodle.

Here is the link to the post: http://adwords.blogspot.com/2006/12/happy-holidays-from-inside-adwords.html