If you're looking to do a little charity work in your spare time, perhaps you should consider becoming a marijuana-legalization activist. You can start tomorrow, by attending the Austin Freedom Fest, a pot-promoting charity concert organized by (who else) Willie Nelson, a totally authentic rock star who pulled off a collaboration with Jessica Simpson while retaining every ounce of his cool and, of course, got busted for toting around several pounds of drugs. Nelson is headlining the festival, all proceeds from which will benefit four marijuana-policy-reform groups that seek to stop the war on drugs. "I'd like to see it taxed and regulated and looked upon as nothing more or less dangerous than alcohol or cigarettes," Nelson said. The seventy-five-year-old rocker no longer smokes cigarettes or drinks alcohol but challenges anyone who claims the pot he's been smoking for fifty years has made him stupid. "I do a two-hour show every night and remember forty or fifty songs," the singer said. "So I challenge anyone out there [to remember them as well as I do]. You might tie it, but I doubt you can beat it."