She began her career covering various sports such as swimming, motorcycle racing and basketball for the state broadcaster Televisión Española from 1997 to 2004 before doing general newscasting on La 2 Noticias until 2006.
[3] In 2006, Villaneuva was signed to leave RTVE and joined the new LaSexta television channel, becoming part of its news broadcasting team alongside Helena Resano and Cristina Saavedra.
[4] Villanueva, Resano and Mamen Mendizábal co-presented the two-hour avant-garde journalistic magazine programme Sexto Sentido that lasted a single season from November 2006 to March 2007.
[9] Villanueva co-presented the sports television progamme No me digas que no te gusta el fútbol with former basketball player Juan Manuel López Iturriaga for two seasons between April 2007 and May 2008.
[2] She has been awarded the Larra Prize for Journalism from the Madrid Press Association and both the TP de Oro and the Premios Ondas accolades collectively for her teamwork.