Mark Hoppus - Not Every Dog Goes to Heaven (National Lampoon's Vacation) (feat. Travis Barker & John Feldmann) Wrote a song for #DogConceptAlbum all proceeds go to @ASPCA http://tinyurl.com/dogsongs@markhoppusI played bass, sang, and did the leady guitar intro. @travisbarker killed the drums. @JohnFeldy shredded the guitars.@markhoppus