Yaremchuk represented Ukraine in the Eurovision Song Contest 2014 held in Copenhagen, Denmark.

"Yaremchuk has an older half-sister Vera from her mother's first marriage and two brothers by her father's side, Dmytro and Nazariy.

On 6 May 2014 was held the first semi-final of the Eurovision Song Contest and Mariya qualified in the Grand Final.

[10] During her Eurovision participation, Yaremchuk received a lot of international media attention due to her being the Ukrainian representative in a contest with Russia in the wake of the annexation of Crimea by the Russian Federation.

In 2015, she released a cover of her father's signature song "Rodyna" on the day of the twentieth anniversary of his passing.

In 2017, Yaremchuk released "Ty v meni ye", which music video was filmed by Alan Badoev.

[16] In March 2018, The Legend of Carpathians (Ukrainian: Легенда Карпат, romanized: Lehenda Karpat) was premiered at the 70th Cannes Film Festival.

In this film, Yaremchuk portrayed Marichka, the lover of folklore hero Oleksa Dovbush.

Yaremchuk stopped updating her social media pages in May 2018, but returned shortly in June 2020 to post two Instagram posts to promote Netflix's film Eurovision Song Contest: The Story of Fire Saga, which was partially inspired by her Eurovision 2014 stage performance.

[19][20] In 2023, she was part of the interval act 'Music Unites Generations' during the second semi-final of the Eurovision Song Contest 2023 alongside Zlata Dziunka and Otoy [uk].