Aston was, along with Baker, one of the four members of Bucks Fizz when they were formed in 1981 to compete in that year's Eurovision Song Contest. They won with "Making Your Mind Up"; the song went to number one in many countries, including the United Kingdom. The group went on to become one of the top-selling groups of the 1980s, scoring many hit singles and albums over the next few years, including two more British number ones: "The Land of Make Believe" and "My Camera Never Lies". Aston designed many of the group's stage outfits. In 1983 she performed the lead vocal on the song "When We Were Young", which went on to become one of the group's biggest hits.