"All Shook Up" is a song recorded by Elvis Presley, published by Elvis Presley Music, and composed by Otis Blackwell. The single topped the U.S. Billboard Hot 100 on April 13, 1957, staying there for eight weeks. It also topped the Billboard R&B chart for four weeks, becoming Presley's second single to do so, and peaked at No. 3 on the country chart. It is certified 2X Platinum by the RIAA.

It was ranked #352 on Rolling Stone's list of the 500 Greatest Songs of All Time.

Blackwell wrote the song at the offices of Shalimar Music in 1956 after Al Stanton, one of Shalimar's owners, shaking a bottle of Pepsi at the time, suggested he write a song based on the phrase "all shook up."

According to Peter Guralnick the song has a different origin. In his book "Last Train To Memphis" he wrote that Elvis thought "All Shook Up" was a good phrase for a refrain. For this he received a co-writing credit, his last.

Elvis himself, during an interview on October 28, 1957, said: "I've never even had an idea for a song. Just once, maybe. I went to bed one night, had quite a dream, and woke up all shook up. I phoned a pal and told him about it. By morning, he had a new song, 'All Shook Up'."

Future Last House on the Left actor David Hess, using the stage name David Hill, was the first to record the song and release it a few weeks before Elvis on Aladdin Records, titled "I'm All Shook Up".

Vicki Young recorded a different song with the same title, "(I'm) All Shook Up", on Capitol Records with Big Dave and His Orchestra, written by Bill Bellman and Hal Blaine in 1956.

On January 12, 1957, Presley recorded the song at Radio Recorders in Hollywood. The duet vocal on the record is by the Jordanaires first tenor Gordon Stoker. Take 10 was selected for release, and in March the song entered Billboard's Top 100 chart at #25. Within three weeks it had knocked Perry Como's "Round and Round" off the top spot, and stayed there for eight consecutive weeks. The song also became Presley's first No. hit on the UK Singles Chart, remaining there for seven weeks. Sales of the single exceeded two million, and the song was named Billboard's Year End number one song for 1957.

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