She became famous in France after the release of her hit single, "Un Monde parfait" ("A Perfect World"), a high-energy techno song which had already been released in Italy in March 2004 under the name 'Tres Bien featuring Ilona', on February 28, 2005. The song reached #1 on France's SNEP charts on March 6, 2005, and stayed on top of the charts for 15 weeks. Her second single, "C'est les vacances", was released on June 20, 2005.
Ilona is finishing junior high at Neuilly-sur-Seine in Hauts-de-Seine. She has sung in many advertisements. Her father was the singer in the band playing in some shows of Canal Plus, and her mother, Sylvie, works at the Michel Lafon publishing house.
Ilona very rarely does live performances, but she was coaxed into appearing on the nationally-acclaimed show Hit Machine on M6. That performance may have sparked her subsequent success with her single "Un Monde parfait".