the 25th Anniversary celebrations for the Eurovision network, which was staged in Montreaux, Switzerland, in April 1979. After signing with CBS subsidiary Epic Records in 1979, the group enjoyed their greatest period of commercial success. Although their debut release – the failed UK Eurovision entry "Harry, My Honolulu Lover" – did not chart, their second Epic single "Spirit, Body and Soul" released in September, reached number 34. In December 1979, the group released the disco-flavoured single "I'm In the Mood for Dancing", which became their best-known tune and biggest hit. It reached number 3 in the UK, number 2 in their native Ireland and number 1 in Japan, a rare event for a Western act; the single eventually sold more than 600,000 copies in Japan. The song, like the majority of the Nolans' hit singles, was written by Ben Findon, Mike Myers and Robert Puzey. The self-titled album Nolan Sisters, which featured the first two charting Epic singles, eventually reached Nº15 in the UK. Although still not an official member of the group, the youngest member of the family, Coleen, appeared on the cover of the album and in the video for "I'm In the Mood for Dancing". In early 1980, the group changed its name from the Nolan Sisters to the Nolans. Coleen released one solo single on Target in 1978, a song about Prince Andrew's status as a teen idol. The group's 1980 album Making Waves peaked at number 11 but had the longest UK album chart run of their career (33 weeks) Singles from the album included "Don't Make Waves" released April 1980 (UK number 12, Ireland number 5); "Gotta Pull Myself Together" released September 1980 (UK number 9, Ireland number 8) and "Who's Gonna Rock You" released November 1980 (co-written by Billy Ocean, UK number 12, Ireland number 14). It was around the time of the release of "Gotta Pull Myself Together" that the line-up changed. Following her marriage, Anne left the group and Coleen became an official member (Anne appears on the UK single sleeve, while Coleen appears in the music video). "Gotta Pull Myself Together" also became the group's first Australian hit, reaching number 3 in 1981; its parent album reached AU Nº10 The last UK single release from Making Waves was "Attention To Me" released in March 1981 (UK number 9, Ireland number 5, Australia number 94). "Sexy Music", also featured on Making