Mariela Rosana Montero Ríos (born September 27, 1980) is an Argentinian model, actress, singer and media celebrity figure.

[1] Before entering the house of Gran Hermano, Montero lived for a few years in the United States, where she studied English and acting and appeared in several telenovelas.

On her return to Salta, Montero worked as a promoter and resumed acting classes with the teacher and theatre director Jorge Renoldi.

In September 2008, a band called Semilla Explosiva composed for her the song "Chica Clandestina" (Clandestine Girl).

In late September 2011, Montero returned to Argentina after she was contacted by Telefe to participate as a panelist in the debates of Gran Hermano 2012.