Anna María Agustí Flores (born 1 October 1966), known professionally as Nina, is a Spanish singer, vocal coach and actress.

In 1987, she rose to fame nationwide in the popular Televisión Española game show Un, dos, tres, where she was cast as one of the "secretaries".

Subsequently, she has worked as an actress in several television shows on TV3 and Televisión Española, has also collaborated in radio programmes, and has released records mainly in Catalan language.

In 2018, she participates as a jury and Academy teacher in the Spanish show Pura magia, on its second season.

She has also played in several stage musicals like Las cuatro cartas (1990), Cabaret (1992), Casem-nos una mica (1993), Te odio mi amor (1995), Company (1997), Pierrot Lunaire (1998), Corre, corre Diva (1998), Espai pel somni (1999), Programa Sondheim (2000), the Spanish production of Mamma Mia!