This is what we found on Wikipedia regarding the Fizz:

Bucks Fizz (also known as The Fizz) are an English pop group that achieved success in the 1980s, most notably for winning the 1981 Eurovision Song Contest with the song "Making Your Mind Up". The group was formed in January 1981 specifically for the contest and comprised four vocalists: Bobby G, Cheryl Baker, Mike Nolan and Jay Aston. They received attention for the dance routine which accompanied the song, in which the male members of the group ripped the female members' outer skirts off to reveal much shorter mini-skirts beneath (in line with the part of the lyrics "...if you want to see some more"). The group went on to have a successful career around the world (although they were commercially unsuccessful in the United States), but the UK remained their biggest market, where they had three No.1 singles with "Making Your Mind Up" (1981), "The Land of Make Believe" (1981) and "My Camera Never Lies" (1982) and became one of the top-selling groups of the 1980s. They also had UK Top 10 hits with "Now Those Days Are Gone" (1982), "If You Can't Stand the Heat" (1982), "When We Were Young" (1983) and "New Beginning (Mamba Seyra)" (1986). Bucks Fizz have sold over 50 million records worldwide.

The line-up of the group has changed a number of times over the years, most famously when Jay Aston quit the group in 1985 and was replaced by Shelley Preston. Bobby G's official version of Bucks Fizz has been almost inactive since 2018, while another group, the Fizz, continues with other Bucks Fizz alumni.