Ha-ha, Ho-ho, Ha-ha, Hee-hee   Ha-ha, Ho-ho, Ha-ha, Hee-hee      Happy, happy, happy Halloween   (Ha-ha, Ho-ho, Ha-ha, Hee-hee)   Happy, happy, happy Halloween (laughing)   (Ha, ha, ha)      Happy, happy, happy Halloween   (Ha-ha, Ho-ho, Ha-ha, Hee-hee)   Happy, happy, happy Halloween (laughing)   (Ha, ha, ha)      Hap-hap-happy--   Happy, laughing pumpkin   Hap-hap-happy--   Sitting on your lawn   Hap-hap-happy--   Wants to tell you somethin'   Hap-hap-happy--   Listen to his song      Happy, happy, happy Halloween   (Ha-ha, Ho-ho, Ha-ha, Hee-hee)   Happy, happy, happy Halloween (laughing)   (Ha, ha, ha)      Hap-hap-happy--   Pumpkin has to leave now   Hap-hap-happy--   Lest he decompose   Hap-hap-happy--   Bouncing down the sidewalk   Hap-hap-happy--   Laughing as he goes      Happy, happy, happy Halloween   Happy, happy, happy Halloween (laughing)   (Laughing) Ha, ha, ha   Ha, ha, ha, ha   Happy Halloween   Pum... pkin