ONE was a boy band that first appeared in 1999, recognized as both Greece and Cyprus's very first boy band. The band was formed by leading Cypriot-Greek composer Giorgos Theofanous and Minos EMI A&R Manager Vangelis Yannopoulos. Constantinos Christoforou and Phiippos Constantinos were on board quite early, chosen by Giorgos Theofanous. The next three members were picked up after a selective audition that took place in legendary Athenian Sierra Studio. The selecting committee consisted of Natalia Germanou, Posidonas Yannopoulos, Andreas Kouris, Themis Georgandas, Theofanous and Yannopoulos. Demetres Koutsavlakis, Savvas Constantinides, Argyris Nastopoulos and Panos Tserpes were retained among 179 candidates. Constantinides left the group in 2000 to pursue other creative interests and Christoforou followed a solo career in 2003. Shortly after, the rest of the band formally disbanded. In their 6 year existence they enjoyed much commercial success and earned platinum certifications, as well as having staged memorable performances with successful Greek singers at music halls and in concerts.
In July 1999 they released their first single, with their debut album following in October. All music and lyrics were written by Giorgos Theofanous (as was all the rest of the musical recorded material of the band) while Vangelis Yannopoulos was producing.
At the end of 2001, national Cypriot broadcaster CyBC requested that they participate in the Eurovision Song Contest 2002. They agreed and Theofanous wrote the song "Gimme" especially for the occasion. Backup vocals were performed by Christina Argyri who was part of the stage duo Voice who represented Cyprus in 2000. After finishing in 6th place they became famous in both Cyprus and Greece and landed platinum certifications.
This was Christoforou's second Eurovision performance as already having represented Cyprus in 1996 with the song "Mono Yia Mas".
Christoforou went on to once again represent Cyprus as a solo artist in the Eurovision Song Contest 2005 with the song "Ela Ela (Come Baby)".