Chappuis was born in Fribourg and grew up in the village of La Brillaz in a family of singers.[2] Her mother Thérèse was in fact one of the Abbot Pierre Kaelin [de]'s choristers.[2] She began her singing studies at the Fribourg Conservatory. She continued her musical training at the Mozarteum Orchestra Salzburg, where she was awarded the prize for excellence in virtuosity.[1]
At the end of her musical training, she briefly joined the Innsbruck Opera under the direction of Brigitte Fassbaender. Since 2003, she has performed on numerous international stages, notably in Europe and Asia.[1]
A virtuoso in baroque singing, Chappuis founded the Lieder Festival in Fribourg in 2001.[3]
In 2017, she released a record entitled "Sous l’empire d’Amour".[4] and in 2018 a record of folksongs from Switzerland entitled "Au cœur des Alpes".[5]
A mezzo-soprano singer, she has a vast repertoire and performs solo roles in classical and romantic operas, Lieder and popular songs, sacred music, and French Baroque Opera.[1]