0 0 0 , ▁playing ▁on ▁stage ▁without ▁any ▁backing ▁mus icians . ▁A ▁CD , ▁Live ▁in ▁Japan , ▁was ▁released ▁in ▁ 2 0 0 1 ▁in ▁Japan ▁only . ▁ ▁Kra use , ▁Moore ▁and ▁B leg v ad ▁reform ed ▁S la pp ▁Happy ▁again ▁in ▁November ▁ 2 0 1 6 ▁to ▁perform ▁with ▁Fa ust ▁at ▁the ▁Week - End ▁festival ▁in ▁C ologne , ▁Germany . ▁The ▁two ▁groups ▁also ▁played ▁together ▁on ▁ 1 0 – 1 1 ▁February ▁ 2 0 1 7 ▁at ▁Ca fe ▁O to ▁in ▁London . ▁On ▁ 2 4 ▁February ▁ 2 0 1 7 ▁S la pp ▁Happy , ▁without ▁Fa ust , ▁performed ▁at ▁M t . ▁R ainer ▁Hall , ▁Sh ib u ya ▁in ▁Tokyo . ▁In ▁September ▁ 2 0 1 7 , ▁S la pp ▁Happy ▁and ▁Fa ust ▁played ▁at ▁the ▁ 1 0 th ▁Rock ▁in ▁O pp osition ▁festival ▁in ▁Car m aux , ▁France . ▁They ▁made ▁a ▁final ▁appearance ▁in ▁November ▁ 2 0 1 7 ▁in ▁Br uss els , ▁Belg ium . ▁ ▁Music ▁S la pp ▁Happy ' s ▁music ▁was ▁ecc ent ric ▁pop ▁with ▁an ▁" avant - gar de " ▁tw ist ▁to ▁it . ▁It ▁drew ▁on ▁a ▁variety ▁of ▁musical ▁id i oms , ▁including ▁w alt zes , ▁b ossa ▁nov as , ▁French ▁ch ans ons ▁and ▁tang os . ▁The ▁songs ' ▁lyr ics ▁were ▁liter