At the beginning, at least, the results were hardly any tamer than the Sun sessions. "Heartbreak Hotel," his first single, rose to number one and, aided by some national television appearances, helped make Elvis an instant superstar. "I Want You, I Need You, I Love You" was a number one follow-up; the double-sided monster "Hound Dog"/"Don't Be Cruel" was one of the biggest-selling singles the industry had ever experienced up to that point. Albums and EPs were also chart-toppers, not just in the U.S., but throughout the world. The 1956 RCA recordings, while a bit more sophisticated in production and a bit less rootsy in orientation than his previous work, were still often magnificent, rating among the best and most influential recordings of early rock & roll.