Charlie Sheen called in music biz heavy hitters -- Snoop Dogg and ex-Korn member Rob Patterson -- to record a song for his tour ... oh yeah, Simon "Dirt Nasty" Rex was there too.
The foursome got together at Charlie's Beverly Hills pad on Thursday night -- where they recorded a song called ... wait for it ... "Winning."
Sheen will roll out the track during his upcoming one-man show.
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