From January 1956 to November 1957, Elvis Presley spent a phenomenal 51 weeks occupying the number 1 spot on the Billboard pop charts. No other pop artist before or since has so completely dominated American pop music.

"I Want You, I Need You, I Love You" is a popular song written by Maurice Mysels and Ira Kosloff. It is known best for being Elvis Presley's second RCA single release. It was released during May, 1956 becoming Presley's second #1 single on the country music charts, and peaking at #3 on the Billboard Top 100 popular music singles chart, an earlier version of the Billboard Hot 100. Before the creation of the Billboard Hot 100 chart during 1958, there were a number of charts including Jukebox plays, Store charts, and Airplay charts. The song scored #1 on the Billboard Top Sellers in Stores chart.

"I Want You, I Need You, I Love You" was backed with My Baby Left Me and was released on May 4, 1956. Pre-orders of over 300,000 were the biggest ever in the history of the company. At the time of its release, Presley had three songs scoring in the Top 20: "Heartbreak Hotel/I Was the One," "My Baby Left Me", and "I Want You, I Need You, I Love You". On June 5, 1956 Presley performed the song on The Milton Berle Show, as well as an early version of "Hound Dog" that resulted in a negative reaction from the media.
~Source Wikipedia