All Things Must Pass  is a triple album by English musician George Harrison.  Recorded and released in 1970, the album was Harrison’s first solo work since the break-up of the Beatles in April that year, and his third solo album overall.  On the original LP’s third disc, entitled Apple Jam, four of the five tracks – “Out of the Blue”, “Plug Me In”, “I Remember Jeep” and “Thanks for the Pepperoni” – are improvised instrumentals built around minimal chord changes, or in the case of “Out of the Blue”, a single-chord riff.  The only vocal selection on Apple Jam is “It’s Johnny’s Birthday”, sung to the tune of Cliff Richard’s 1968 hit “Congratulations”, and recorded as a gift from Harrison to Lennon to mark the latter’s 30th birthday.  In a December 2000 interview with Billboard magazine, Harrison explained:  “For the jams, I didn’t want to just throw [them] in the cupboard, and yet at the same time it wasn’t part of the record; that’s why I put it on a separate label to go in the package as a kind of bonus.”  (More from Wikipedia)