PHOTOS: The life and times of Willie Nelson

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Country singer-songwriter Willie Nelson appears at the Country Music Association Awards in Nashville, Tenn., Sept. 29, 1993.
Country music legend Willie Nelson on NBC's "Today" show in New York before his eightieth birthday.
Country singer Willie Nelson, center, and his wife Annie mingle with rock and roll guitarist Edgar Winter at the premiere of the film "Wag the Dog," Wednesday, Dec. 17, 1997.
President Clinton and first lady Hillary Rodham Clinton applaud Willie Nelson at the White House on Sunday, Dec. 6,1998, during a reception for Kennedy Center Award winners.
Willie Nelson listens to Kit Fogle, legistative director of the Ohio Farmers Union as he talks about livestock operations Wedensday, Aug. 12, 1998, in Columbus, Ohio.
Singers Willie Nelson and Lyle Lovett, right, perform with Lovett's Large Band at the annual ESPY awards show at New York's Radio City Music Hall, on February 13, 1995.
Country singer Willie Nelson performs as the closing act at the US Festival in Devore, Ca., Saturday night, June 5, 1983.
Country music singer Willie Nelson poses with President Carter’s son Chip at a fund raiser in Atlanta at night on Tuesday, April 15, 1980.
Willie Nelson poses in a hotel in New York, Jan. 14, 2002.
Country music singer Willie Nelson and his children Amy, left, and Paula talk with first lady Rosalynn Carter at the White House on Sept. 23, 1978.
(AP)
Willie Nelson poses with his wife, Connie, after receiving the Lifetime Achievement Award at the Songwriter's Hall of Fame Awards ceremony on March 7, 1983.
Musician Willie Nelson performs during the Farm Aid Concert event Sunday, Oct. 4, 2009, in St. Louis.
Ke$ha and Willie Nelson appear on NBC's "Today" show on Tuesday, Nov. 20, 2012 in New York.
Willie Nelson performs at the Heartbreaker Banquet on Thursday, March 19, 2015, in Spicewood, TX.
Country and Western singer Willie Nelson is appearing, Jan. 16, 1978 at the Rainbow Room in Rockefeller Center in New York.
Willie Nelson performs in concert at The Grand Opera on Wednesday, Sept. 10, 2014, in Wilmington, Del.
Country singer Willie Nelson is seen in 1986.
Country singer Willie Nelson attends a reception for the recipients of the 2010 Kennedy Center Honors in East Room of the White House, Sunday, Dec. 5, 2010.
Country Singer Willie Nelson joined folk and rock singer Bob Dylan, right, on stage before more than 78,000 people attending the Farm Aid benefit concert.
Willie Nelson performs during the Farm Aid 2013 concert at Saratoga Performing Arts Center in Saratoga Springs, N.Y., Saturday, Sept. 21, 2013.
Willie Nelson performs during the Farm Aid 2012 concert at Hersheypark Stadium in Hershey, Pa., Saturday, Sept. 22, 2012.
Willie Nelson crosses the finish line at the first annual Willie Nelson distance classic on Sunday, June 15, 1980 near Lake Travis in Austin, Texas.
Country singer Willie Nelson performs during the pregame show before Super Bowl XXXVIII on Sunday, Feb. 1, 2004, at Reliant Stadium in Houston.
Willie Nelson and Farm Aid executive director Carolyn Mugar talk with reporters during a press conference prior to the start of the Farm Aid 2013 concert, Saturday, Sept. 21, 2013.
Willie Nelson arrives at the 56th annual GRAMMY Awards at Staples Center on Sunday, Jan. 26, 2014, in Los Angeles.
Willie Nelson and Neil Young meet with members of the Senate Agriculture Committee on  September 20, 1985 in an attempt to lobby for legislation that would boost farm income.
Willie Nelson performs during opening set at the FarmAid benefit concert September 22, 1985 at Champaign, Illinois.
Singer Willie Nelson joins Texans United to protest a trade agreement, at an economic summit in Houston, Texas, on July 2, 1990.
Singer Willie Nelson leaves the Federal Building in Austin, Texas, on February 3, 1993, after settling his tax problems with the Internal Revenue Service.
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PHOTOS: The life and times of Willie NelsonCountry singer-songwriter Willie Nelson appears at the Country Music Association Awards in Nashville, Tenn., Sept. 29, 1993.
AP Photo/Mark Humphrey

He's best known for his legendary music, but iconic country singer Willie Nelson is also leaving a mark on the world through his activism.

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Nelson burst onto the music scene in the late 1950s with his single "No Place For Me," and charted several years later with "Willingly," a duet with Shirley Collie.

Take a look back at moments from legendary country singer Willie Nelson's life.

Over the past half-century, Nelson has released dozens of singles and topped the country charts time and time again. The 2003 single "Beer for My Horses," a collaboration between Nelson and Toby Keith, spent six weeks at the top of the charts and a remarkable 39 weeks total on the chart.

Thanks to the success of "Beer for My Horses," Nelson holds the distinction of being the oldest artist to top the Hot Country Songs chart, according to Billboard.

As an activist, Nelson has thrown his weight behind farm policy reform, marijuana legalization, LGBT equality and animal rights. He teamed up with other prominent country acts to organize the 1985 Farm Aid concerts, which raised millions of dollars for American farmers.

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