Yanofsky began her professional singing career by performing at the 2006 Montreal International Jazz Festival. Only 12 at the time, this performance made her the youngest performer ever to headline at the festival. She has returned each year since, including a special outdoor performance for the festival's 30th Anniversary in 2009 and a performance with l'Orchestre Métropolitain in 2011. Her other Canadian festival performances include Toronto (Luminato and Downtown), Ottawa (Jazz and Blues), Vancouver, Victoria, Quebec, Edmonton, Saskatoon, and Fredericton. Her international festival appearances include two visits to The Jamaica Jazz and Blues Festival, several European festivals including the North Sea Jazz Festival and the Montreux Jazz Festival as well as the Ginza International Jazz Festival in Japan at Kabuki-za.