 Nyora kupfuurira kweiyi ndima - Holmquist akatanga kubatsira boka rokutamba reSweden Curt Haagers muna 1966. Akaridza chiridzwa cheorgano muboka racho kutozosvikira aenda muna 1969. Akaitisa kupinda kweSweden, Diggi-loo Diggi-ley, mu1984 Eurovision Song Contest uye yakaitwa naHerreys yakakunda makwikwi. Holmquist akatungamira zvinyorwa zveSweden kuEurovision Song Contest pazviitiko zvitanhatu: 1984, 1985, 1987, 1990, 1993 uye 1997. Mukuwedzera pakutungamirira kupinda kweSweden iye akatungamirirawo kupinda kweBelgium muna 1985. 