On 6 December 2005, Arjona released his tenth studio album, "Adentro". This was Arjona's first collaboration with Tommy Torres. In an interview, the singer commented that he first "tested" Torres by sending him the "hookiest and darkest tracks" on the album, "Acompañame A Estar Solo" and "Iluso". Torres said that he "went all out on the first demo, hiring a full band that included a string orchestra", which grabbed Arjona's attention. The album was critically acclaimed, with Evan C. Gutiérrez from Allmusic giving it four stars out of five and commenting that "Be it for the stripped, natural production value, the confident performance of Ricardo Arjona, or his relevant-as-ever lyricism, he's got both his loyal fans and the execs at Norte smiling. While the instrumentation, performance, and overall sonic palette of this project are minimalist and unassuming, there is a depth and brilliance to them. The listener's ear does not tire or want for more, humble as "Adentro" is." Arjona further commented that "Adentro" was "a very representative and tremendously complete album," adding that "having different producers made it rich in possibilities."