"Por Lo Que Reste de Vida" (English: For the Rest of My Life) is a song by Mexican singer-songwriter Thalía from her twelfth studio album Amore Mío (2014). The song was written by Ricky Montaner and produced by Armando Avila and was released by Sony Music Latin as the lead single from the album on September 9, 2014. A bachata version of the song was released to digital download on October 14, 2014. "Por Lo Que Reste de Vida" is a Latin pop ballad that lyrically talks about unconditional and everlasting love.

Upon its release, "Por Lo Que Reste de Vida" received generally favorable reviews from music critics, who considered the song an "all-out pop anthem" with simple but lovely lyrics. The song attained success on the charts, reaching the top-three on both Dominican Republic and Mexico charts, while reaching moderate impact on the US Hot Latin Songs and Latin Pop Airplay charts. A music video for the song was released in October 14, 2014 and it tells a tale about an eternal and immortal love.

After releasing the successful Habítame Siempre (2012), her eleventh studio album, which was certified 3x platinum, becoming her first album since Arrasando (2000) to receive a platinum certification in Mexico, Thalía embarked on her Viva! Tour (2013) and later released its live album the same year. In 2014, she released first children's album, "Viva Kids", and while promoting it, she confirmed she was recording her twelfth studio album, stating that, "I'm actively writing, co-writing, producing and co-producing. I'm doing everything. This album, I find, is a little bit more sexy."

Thalía also revealed that the album's first single would be released by the end of 2014, and the album at the beginning of 2015. On September 9, 2014, Sony Music Latin released "Por Lo Que Reste de Vida" as the album's first single via digital download through iTunes and Amazon. The same day the song's audio was also uploaded to Thalía's VEVO account on YouTube. A bachata version of "Por Lo Que Reste de Vida" was released on October 14, 2015.

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