"Lo Que Pasó, Pasó" (English: "What Happened, Happened") is a single by Puerto Rican rapper Daddy Yankee from his third studio album Barrio Fino.

It was released in September 2004 by Machete Music and El Cartel Records.

It is known to be one of Daddy Yankee's signature songs, and also one of his most successful singles and won the Lo Nuestro Award for Urban Song of the Year.

[1] The song became Daddy Yankee's third most successful in the United States during 2005, behind "Gasolina" (Hot 100 peak number 32) and "Like You" (Hot 100 peak number 72).

Billboard Hot Latin Songs chart, peaking in the top five at number two and number one on the Tropical Songs chart where it was the best-performing track of the year.