Anna-Mari Kähärä (s. 1963) is a distinguished and versatile artist, who is known from her extensive work on the Finnish cultural field as a composer, an arranger, a producer and a singer. Her compositions have been interpreted by numerous a cappella ensembles, choirs, symphony orchestras and soloists. This multi-talent has said that she learned to sing approximately same time as she learned to speak, and that she has gotten many of her collegues, and often also her audience, to sing.

How Many Sisters has been an important group for Kähärä since the beginning of 1980's. The debut album How Many Sisters? (Kerberos) was released in 1983, besides Kähärä the group consisted of Mervi Hiltunen and Kirsi Rissanen. The reputation of the group grew in the late-1980's and in the beginning of the next decade along with the numerous television performances. Later on Kirsi Rantanen moved into solo career and she was replaced by Pirjo Aittomäki.

In 1994 the trio did their first co-production with UMO and at the same time a contact with pianist and composer Kirmo Lintinen was established. Lintinen has since then worked as a standard pianist for the group. UMO and Kirmo Lintinen Trio played also on the second album of How Many Sisters, Sotlen Moments (Proprius 2002) that mixed jazz standards and Kähärä's compositions versatilely and uniquely. Besides How Many Sisters Kähärä has successfully composed and arranged music to numerous groups, for example to the Rajaton a cappella group.

As a pianist and accordionist Anna-Mari Kähärä was heard for the first time in the beginning of 1990's in an original fusion group of Jussi Liski called Lentävä Siemen, which published their first album in 1991 (Amigo). In the middle of 1990's Kähärä joined ZetaBoo, a quartet that skillfully combined the tones of jazz and world music. Besides Kähärä, in Zetaboo played guitarist Jarmo Saari, bass player Pekka Lehti and drummer Marko Timonen. In ZetaBoo Kähärä's main instrument was the accordion but the wordless singing of the whole band was an evident part of the expression of the band.

In fall 2002 Kähärä got the Finland-award of Arts and the Jazz Federation's Georgie award as the first woman of all time. The latter brought to Kähärä a tour in Finland organized by Jazz Federation where she presented her new band, The Orchestra of Anna-Mari Kähärä, which consists of her, guitarists Marzi Nyman and Jarmo Saari and percussionist Zarkus Poussa. All the members of the band also sing. Besides her own band, Kähärä is known from her poem productions and compositions to movies, theatres and choirs.