Reyes was born in the northern Mexican city of Monterrey, Nuevo León, and started singing and playing piano when she was ten.[1] She began uploading videos of herself covering songs on YouTube two years later. Her videos managed to capture the interest of many, including Latin American singer Prince Royce, who went on to sign Reyes with his then newly created music label D'León Records at the age of 12. As the first ever singer to be signed to the label which Royce created in partnership with Warner Music Latina in order to "support other young talent in their development", Reyes launched her debut single "Now Forever", featuring American rapper Khleo Thomas in 2013.[2]
Reyes collaborated with Puerto Rican singer Wisin and German producer Toby Gad to co-write the single "Muévelo", which was released in August 2014.[3] Her subsequent single "Conmigo (Rest of Your Life)" was launched the following year. The music video for the latter song sees American singer/actor Kendall Schmidt of Big Time Rush and Heffron Drive making an appearance as Reyes' love interest on a secluded beach.[4] In early 2016, Sofia released her third single "Solo Yo", a heartfelt ballad and her first singing collaboration with mentor Prince Royce. Both are featured in the official music video.[5] She released a song called "1, 2, 3" along with Jason Derulo and De la Ghetto. In March 2019, Sofia released the song "R.I.P.", featuring Rita Ora and Anitta. In May 2019, Spanish singer Beret released a duet version of his song "Lo siento" (English: I'm sorry) featuring Reyes.[6][7]