Anna Abreu (born Anna Eira Margarida Mourão de Melo e Abreu on 7 February 1990 in Vantaa, Finland) is a Finnish-Portuguese singer who rose to fame as the runner-up of the third series of the Finnish singing talent show Idols in 2007. Her music is primarily pop, though her songs also have R&B, dance and Latin rhythms to them. Since her participation in Idols, Abreu has become one of the best-selling Finnish Idols contestants and one of the most successful Finnish female singers, with certified record sales surpassing 180 000 copies, which places her also among the 100 best-selling music artists of all time in Finland.

Abreu's Portuguese father Paulo lives in Sintra, Portugal, while she and her Finnish mother Liisa live in Vantaa. Abreu has a brother Emil, who is four years older than she is. As a young girl she lived in Portugal and outside music, her other hobbies include reggaeton-dance and playing the violin. Abreu became multi-lingual at a young age, being fluent in Finnish, Portuguese, English, Spanish and a little Swedish.