Just went through this years Hannukkah sessions. Dave only sings one song (I Love LA) and had guest singers in for the others including Pink, Jack Black, Beck and the lead singer of the Yeah Yeah Yeahs. The best song was "At Seventeen" by Dave's daughter Violet. If you read the comments under the video, you can see Janis Ian weighing in and thanking them for singing her song.
As a matter of fact, my anger does keep me warm

