Eronen began her music studies in the Osterbothnian Conservatory in Kokkola, violin as her main instrument. She started taking singing classes in high school and got interested in pop and jazz band-playing around the same time. Eronen graduated as a pop/jazz voice teacher from Stadia in 2007.
She participated Lady Summertime jazz singing contest in 2001 coming third. During the same year Eronen also started performing with the Beatles tribute group NO9 around jazz arenas in Finland. They also made a radio recording to YLE, Finnish Broadcasting Company, in 2010.
Today she sings in various jazz ensembles, cover bands both in lead and backing vocals and in the folk-gospel group Mustarastas. Besides her recordings with Mustarastas, Eronen has had some radio time with her own single releases (Painuu päivä peltikattojen taa, theme song in YLE TV miniseries Stalkkeri, 2012 and Lasia, 2011). She also performs with her own Monica Zetterlund tribute group Z League.