kidnapped by her uncle. Then, in 2005, Arjona adopted new sounds in Adentro. Gutierrez considered the instrumentation, performance, and overall sonic palette to be "minimalist" and "unassuming". On this album, Arjona included more Latin sounds, Mexican and Tejano music on "Mojado", a song about immigration; merengue and Colombian tones on "Adiós Melancolía", and some on "No Te Cambio Por Nada". 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.5to Piso is mainly driven by piano and strings. Exceptions are "La Bailarina Vecina", crafted with pure orchestral arrangements; and "Ni Tú Ni Yo", a Ranchera style song featuring Paquita la del Barrio. The album also includes a song called "Que Nadie Vea", in which the artist sings about homosexuality. On 5to Piso, Arjona commented that he tried to recoup the freshness of his first albums, saying that he "tried to reconcile a little with the Ricardo Arjona from the first albums to let out some of that freshness that makes so good to the songs." Poquita Ropa offered a drastic change in which Arjona minimized the number of instruments. The result was a set of a cappella performances. Arjona commented about this album that "music and women look better with little clothes." Production was handled by Arjona and Dan Warner, who also worked with Shakira, Celine Dion and Christina Aguilera. Birchmeier gave the album a somewhat positive review, saying that it was