Musk dropped it on Soundcloud late Thursday night on his Emo G Records stream, saying ... "I wrote the lyrics & performed the vocals!!" Those lyrics consist of the title followed by "because it's true" ... which is alternated with, "because it's you," and repeated.
The making of Elon's 4-minute EDM song must have been quite the journey, because when he first mentioned it on Twitter Thursday he said, "Just wrote a song called “Don’t doubt yer vibe" ... with a different spelling of "ur." He also stated, "this song is hard."
Finally, to make things as Musky as possible ... the Soundcloud artwork features his Cybertruck.