On 2007's "Quién Dijo Ayer", Arjona reworked past songs to fit a new style. For example, he gave "Si El Norte Fuera El Sur" a ska beat, and performed with the aid of Panteón Rococó. He transformed "Historia de Taxi" into a salsa song, with the help of American singer Marc Anthony and pianist Sergio George, who commented that "It's been interesting to work with two figures from different music worlds on the interest of making good music." He further stated that "every time a reunion of this kind happens, it's a reason to celebrate." Birchmeier commented, "While only a couple of the new versions depart stylistically from the originals, the contemporary productions breathe new life into these songs." "Realmente No Estoy Tan Solo" was re-recorded with singer Sandro. This turned out to be the last song recorded by the latter, who died 4 January 2010. This album included three new songs. The lead single, "Quién" was written by Arjona and produced by himself and Torres. "Quiero" and "Espantapájaros" are the other two new songs on the album.