Music (some may be difficult to find proof even though it is clear they smoked): Beatles, Bob Dylan, Rolling Stones (busted with weed), Bob Marley (duh), Led Zeppelin, Grateful Dead, Jimi Hendrix, N.E.R.D, Sublime, Cypress Hill, The Doors, Wyclef Jean

Authors: Ken Kesey author of One Flew over the Cuckoos nest, major acid head and smoked weed, Allen Ginsberg - famous beat poet, Jack Kerouac - beat generation writer, Shakespeare - evidence of cannabis and cocaine traces found in pipes buried at his house, Hunter S Thompson - did everything under the sun...

Other noteworthy mentions: Carl Sagan - famous astronomer, Bruce Lee - cannabis traces found in autopsy