Nena Marques, known professionally as Nena, is a Portuguese singer. Nena rose to national attention after finishing tenth in Festival da Canção 2024, the contest used to select the artist representing Portugal Eurovision Song Contest.
After wanting to pursue music since the age of 12, Nena began recording in 2019 and released her first single, "portas do sol", in 2020. The song served as the lead single to her debut album which was released in 2022. In the song, Nena details growing up in Lisbon. The song has accumulated over 9.1 million views on YouTube. Nena released her first, and to date only, album on 18 November 2022 titled ao funda rua. The album features ten singles.
In 2023, Nena released the non-album single "os croquetes acabam". The following year, she released the single "Lembras-te de mim?" with .
In 2024, Nena was one of twenty-two artists from Portugal to be selected to participate in the contest Festival da Canção. The festival chooses the artist to represent Portugal in the Eurovision Song Contest each year. In the contest, Nena performed her original song "Teorias da Conspiração". After finishing in third place in her respective semi-final, Nena reached the final where she finished in tenth place overall. The festival boosted Nena's popularity in Portugal.
On 3 January 2025, Nena released "àEspera Do Fim" with the winner of season 8 of The Voice Portugal, LuÃÂs Trigacheiro. On 21 January 2025, Nena was confirmed to be a coach on the sixth season of The Voice Kids Portugal alongside Cuca Roseta, Diogo Piçarra, and Miguel Cristovinho.