Sine Bundgaard was born in Århus, Denmark, and studied at the Royal Danish Conservatory of Music and the Opera Academy at the Royal Theatre, both in Copenhagen. She made her professional debut at the Royal Theatre, Copenhagen, as Barbarina in LE NOZZE DI FIGARO in 1999.
She was instantly invited to sing at some of the most prestigious operahouses in Europe, such as Opera National de Paris(Echo, covering Zerbinetta, 1st Blumenmädchen), The Royal Opera House of Copenhagen(Gilda, Corinna, Adele, Drusilla, Susanna), Bayerische Staatsoper in Munich (Fiakermilli, Echo, the Cheshire Cat) and Drottningholm Slottstheater (Amelite). She has also guested in the operahouses in Avignon (Zerbinetta), Marseille (Zerbinetta), Antwerpen (Zerbinetta), Nancy (Blondchen), Lausanne (Konstanze), Niîmes (Konstanze), Th. De Champs-Èlysèe (Konstanze),Opera Comique (Amélite), teatro delle muse di Ancona (Konstanze), Holland Festival in Amsterdam (Amelite), Innsbrucker Festwochen (Angelica) and the danish National Opera (Susanna and Adina).
Her repertoire has a wide range from the late romantics Mentioning Strauss and Berg till the early music stage Mozart, Bach, Haydn and Rameau not forgetting the bel canto: Verdi, Donizetti and Rossini to name a few.
Equally at home on the concert platform she sang Mahlers 4th symphony in Symphony Hall, Birmingham with the CBSO and Manfred Honeck, Carmina Burana in Sala Sao Paulo with OSESP and Antoni Wit, Brahms Requiem with Orchestre de Champs Elysée and Philippe Herreweghe, Carl Nielsens 3rd symphony with Stockholm Symhony orchestra and Tobias Ringborg, Lakmé in Queen Elizabeth Hall, London with COG, Songs by Strauss and Grieg in Dvorak Hall, Prague with the danish radio symphony orchestra and Thomas Dausgaard and Bergs Sieben frühe Lieder with Århus symphony orchestra and Giancarlo Andretta.
She sang with the conductors Rene Jacobs, Phillippe Herreweghe, Kent Nagano, Bertrand de Billy, James Conlon, Pinchas Steinberg, Michael Schønwandt, Enrique Mazzola, Giancarlo Andretta, Matthias Pintscher, Lars Ulrik Mortensen, Christophe Rousset, Manfred honeck, Theodor Guschlbauer, Peter Schneider, Thomas Dausgaard, thomas Søndergaard, Antoni Wit, Rolf Gupta and Tobias Ringborg.
Besides her opera- and concertschedule Sine dedicates much time to recitals and Lieder. Containing songs by Strauss, Duparc, Berg and Poulenc, her EMI Debut CD, featuring the Danish Radio Sinfonietta and conductor Matthias Pintscher, was voted Vocal CD of the Year 2005 by the listeners of Danish Classical Radio and reciewed raving reviews internationally. As a recitalist she sang in Wigmore Hall, Tokyo, Lille and in numerous venues in her native Denmark. In 2004 she was elected Artist of the year for Danish National Radio. Sine received the prestigious Aksel Schiøtz prize, and in 2006 she recieved Elisabeth Dons prize and prins Henriks prize.