http://s.ytimg.com/yt/img/doodles/adblitz-vflduMTXH.png

And in 2009 the doodle was...
http://s.ytimg.com/yt/img/logo-superbowl-vfl75173.png

Super Bowl XLV on YouTube blog:
http://youtube-global.blogspot.com/2011/02/super-bowl-xlv-fun-facts-about-food.html

Google web search page:

"Choose your favorite TV ad from the 2011 Super Bowl on YouTube"
http://www.youtube.com/adblitz (embedded adurl)

Google's blog post is linking to

http://www.youtube.com/watch?v=GDOwxk8Og5c

:)