Yahritza was just 14 when she wrote "Soy El Unico." It's the first song she ever wrote.
She showed it to Jairo, who loved it and had her sing the tune to Mando. "When I first heard her singing it, I was like, 'Oh she's singing a cover,'" Mando recalled to Rolling Stone
. "Then when she shared it with me, I was like, 'That's your song?'"