It is by Samanta Tīna, who retains the Eurovision slot she won last year, following the cancellation of the 2020 event. The song is called 'The Moon Is Rising' and purports to be a paean to female empowerment. You can watch it below.
The finals of the 2021 Eurovision Song Contest are scheduled to take place on May 22, and the semi-finals on May 18 and 20, in Rotterdam.