http://www.huffingtonpost.com/2012/02/16/sir-paul-mccartney-gives-up-smoking-pot_n_1281622.html

Sir Paul McCartney Gives Up Smoking Pot At Age 69ir Paul McCartney may have looked younger than ever during his Grammy performance Sunday, but the former Beatles member says he's finally giving up a large part of his youth: marijuana.

In a new interview with Rolling Stone magazine, McCartney reveals that Bob Dylan first introduced him to cannabis -- and that he also experimented with a host of others, including heroin, LSD and cocaine. He has unashamedly stuck with the weed-smoking habit since the 1960s, and was famously arrested in Japan in 1980 for possessing pot.

Now the 69-year-old music legend, who finally received his star on Hollywood's Walk of Fame on February 9, says it's time to give up this part of his life -- for his 8-year-old daughter Beatrice (from second wife Heather Mills).

“I smoked my share. When you’re bringing up a youngster, your sense of responsibility does kick in, if you’re lucky, at some point... Enough’s enough -- you just don’t seem to think it’s necessary," he said