Paul McCartney (b. June 18, 1942)
A member of the most successful rock-n-roll groups of all time, Paul McCartney helped pay for a July 24, 1967 advertisement in the London Times that called for legalization of pot possession, release of all prisoners on possession charges and government research into marijuana's medical uses. Other signatories included VIPs John Lennon and Francis Crick.
Reportedly, Bob Dylan turned the Fab Four onto pot in 1964. Lennon told a Paris newspaper that their band smoked pot at Buckingham Palace before being decorated by the queen in 1965.
"I think we could decrimalize marijuana, and I'd like to see a really unbised medical report on it," McCartney said after being deported from Japan for bringing nearly half a pound of marijuana into Tokyo for a "Band on the Run" concert tour on January 13, 1980. Exactly four years later, he was arrested for marijuana possession in Barbados.
McCartney has now admitted that "Got to Get You Into My Life" was written not to a woman, but to marijuana. (Source: Barry Miles, Paul McCartney: Many Years From Now.)
At Superbowl 2005. Paul played "Get Back" with the lyric, "Jo Jo left his home in Tucson Arizona, for some California grass." The following year, McCartney and wife/killjoy Heather Mills officially split, within months after the news went out that Mills would not allow her husband to smoke pot.