Do you remember the 2009 story of Everyday Chemistry? According to lore, it's an "unreleased" studio album by The Beatles that came into the possession of an unnamed person identified only by the pseudonym "James Richards", under mysterious circumstances after crossing to a parallel world where The Beatles never broke up. Richards describes meeting a man named Jonas and the two discussed their love of the Beatles, and just before leaving the parallel universe and traveling back to his own, Richards stole a cassette tape containing one of The Beatles' albums from that imagined timeline. Richards denied that the album was composed of mashups, reasoning that "even though in the alternate universe the Beatles hadn't broken up, that didn't mean their future music ideas disappeared."
In reality, it's just a mashup of Beatles and solo Beatles works. Check it out below.