Elvis Presley is very famous. Considered one of the largest cultural icons of the 20th century, Elvis has managed to earn the nickname "The King". He simply unlocked the game of life. Presley's first RCA single, "Heartbreak Hotel", was released in January 1956 and became a number-one hit in the United States. Each of the three Presley singles released in the first half of 1957 went to number one: "Too Much", "All Shook Up", and "(Let Me Be Your) Teddy Bear". He is the best-selling solo artist in the history of recorded music, with estimated record sales of around 600 million units worldwide. Most popular songs include "Hound Dog", "Jailhouse Rock", and "Heartbreak Hotel".