Williams was unknown at the time she took part with two songs in the 1981 Dutch Eurovision selection, as a last-minute replacement for singer Oscar Harris, who had had to drop out at short notice. One of her songs, "Het is een wonder" ("It's a Miracle") emerged the winner, sending Williams forward to the 26th Eurovision Song Contest which took place in Dublin on 4 April. "Het is een wonder" finished the evening in ninth place of the 20 entries.