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Always On My Mind: In 1987, Pet Shop Boys performed a synthpop version of “Always on My Mind” on Love Me Tender, an ITV network television special commemorating the tenth anniversary of Presley’s death, in which various popular contemporary acts performed cover versions of his hits. Their performance was so well-received that the group decided to record the song and release it as a single. This version became the U.K.’s Christmas number one single that year. It also reached number one in Germany in 1988, and peaked at number four in the United States on the Billboard Hot 100 the same year, becoming the duo’s fifth and last Top 10 hit there. It is their best selling single in the official UK Singles Chart.
The Pet Shop Boys version introduces a harmonic variation not present in the original version. In the original the ending phrase “always on my mind” is sung to a IV-V7-I cadence (C-D7-G). The Pet Shop Boys extend this cadence by adding two further chords: C-D7-Gm7/B♭-C-G (i.e. a progression of IV-V7-i7b-IV-I).
In the video (an excerpt from their surreal music film It Couldn’t Happen Here), Neil Tennant and Chris Lowe are seated in the front of a taxi cab, when an odd passenger gets in, played by notable British actor Joss Ackland. At the end of the song, he gets out of the car, which drives away. Standing alone, he mutters: “You went away. It should make me feel better. But I don’t know how I’m going to get through”, which is part of the lyrics for another Pet Shop Boys track.
In 1988, the duo rerecorded the song for their third studio LP, Introspective, combining it with an acid-house track called “In My House”.

Pet Shop Boys are an English electronic dance music duo, consisting of Neil Tennant, who provides main vocals, keyboards and occasionally guitar and Chris Lowe on keyboards and occasionally backing vocals.
Starting out, the two called themselves West End, because of their love of London’s West End, but later they came up with the name Pet Shop Boys, which derived from friends of theirs who worked in a pet shop in Ealing.
They have sold over 100 million records worldwide, and are listed as the most successful duo in UK music history by The Guinness Book of Records. Since 1986, they have achieved 42 Top 30 singles and 22 Top 10 hits in the UK, including four Number Ones. (Quelle Wikipedia)