Question: What is the singer of Mamo known for?

Context paragraphs:
Mamo (song): "Mamo" (Ukrainian Cyrillic: Мамо; English translation: "Mum"; Russian translation: Мама (Mama)) is a song by Ukrainian singer Anastasia Prikhodko.  It is best known as Russia's entry in the Eurovision Song Contest 2009, held in the Russian capital of Moscow.  The song is performed in both Russian and Ukrainian, and was composed by Konstantin Meladze and Diana Golde.  The song was first submitted (in the original full Ukrainian variant) for the Ukrainian preselection for that year, but failed to qualify, winning afterwards the Russian preselection.

Anastasia Prikhodko: Anastasia Konstantinivna Prikhodko (Ukrainian: Анастасія Костянтинівна Приходько ; Russian: Анастаси́я Константи́новна Прихо́дько : Anastasia Konstantinovna Prikhodko [also spelt "Prykhodko"]; born April 21, 1987) is a Ukrainian folk rock and traditional pop singer, known for her deep contralto.  She won the Russian "Star Factory" contest in 2007 and represented Russia in the Eurovision Song Contest on May 16, 2009 in Moscow, where she finished 11th.  In 2014, she vowed never to perform in Russia again because she accused the country of occupying parts of Ukraine.

Supporting paragraphs: Mamo (song) Anastasia Prikhodko
Answer: her deep contralto