I'd want 2 funerals, one for all the people who severely bullied me at my old school, the song that would play when they attend is "The d***head song" Because it'll be a message form me to them from the grave x)
The other one for my family and friends I'd want Tomas the Tank Engine song remixes to play, because I dye of laughter when I hear them

And I'd want something stupid to make those I loved smile xD
EDIT: I'd also want Mr.Vile's Theme off Banjo Kazooie, OR the start of "I Am The Great Mighty Poo Theme"