Popcorn

""Popcorn" is a famous early synthpop instrumental. Composer Gershon Kingsley (of Perrey and Kingsley) first recorded it for his 1969 album Music to Moog By.
Stan Free rerecorded the instrumental with his band Hot Butter in 1971, which became the first primarily electronic-based piece of music to reach the American popular music charts. The record was one of a rash of Moog synthesizer-based releases that characterized "synth-pop" of the 1960s and 1970s ..." [Quoted from Wikipedia entry]

Versions of popcorn (kind of "old" link but continuously updated)

Gershon Kingsley - Popcorn (1969 Original):

Added by TONYM2M2

Some other popcorns at the video sharing sites:
- Marsheaux - Popcorn
- Messer Chups - Popcorn
- Jean Michel Jarre - Popcorn

Updated: wieL tells us about his (excellent!) blog Wiel's Time Capsule's posts with a few very nice versions. Like one by Klaus Wunderlich as part of a medley with Apache and Corn-Flakes.
And other one by James Last, and one cover by Gershon Kingsley himself, recorded on a Groovebox in 2000. Listen to these 3 tracks here.
There is also a vocal verion by Anarchic System to enjoy here.