This is the FGfanimation I wanted to do earlier today. Brian, Stewie and Vinny are singing the Winter Solstice song from Little Bear (based on the books by Maurice Sendak). And yes, I voice all three characters in the video.

Software used:
Moho Pro 12
Audacity

Note: Family Guy is copyright of Seth MacFarlane, FOX and The Walt Disney Company. Little Bear is copyright of Maurice Sendak (even in death), Nelvana, Nick Jr. and Viacom.