Norwegian recording artist Sissel Kyrkjebø, known internationally as Sissel, has recorded songs for twelve studio albums and has collaborated with other recording artists for vocal duets and featured songs on their respective albums. Sissel is considered one of the world's top crossover sopranos and her combined solo record sales (not including soundtracks and other albums to which she contributed) amount to 10 million albums sold, most of them in Norway, a country with 5 million people. Her albums have also sold well in Scandinavia, the US and Japan. Together with Odd Nordstoga, they are the only Norwegian artists to have an album go 11 times platinum in album sales for Strålande jul" (Glorious Christmas) in 2009.