Elton John criticized the legalization of marijuana, calling it addictive and impairing cognitive thinking. He reflected on his own drug use, revealing that cocaine was his drug of choice. Following a turning point at the funeral of his friend Ryan White, John checked into rehab and has been sober since 1990. He has since helped others with their sobriety journeys, including Boy George and Eminem. John also tried to support George Michael before his death in 2016.
Source: https://people.com/elton-john-sober-says-marijuana-legalization-mistake-8759571