On April 22, 1936, a country music legend was born: Glen Campbell. The small-town boy from Billstown, Ark., went on to be one of country music's biggest stars.

For more than 50 years, Campbell entertained fans with songs such as "Gentle on My Mind," "Rhinestone Cowboy," "Wichita Lineman" and many, many more -- but he got his start as a session musician. The country icon played on recordings by Elvis Presley, Frank Sinatra, Merle Haggard, the Monkees and others before launching his own career.

It wasn't until 1967 that Campbell's career as a solo musician began to gain momentum. But when it did, that momentum led to Grammy Awards, No. 1 hits and even Campbell's own variety show, The Glen Campbell Goodtime Hour. The singer's illustrious career also includes a Country Music Hall of Fame induction in 2005.

In 2011, Campbell revealed that he had been diagnosed with Alzheimer's disease, and he embarked on a farewell tour that concluded in November of 2012. Campbell then released his last song, "I'm Not Gonna Miss You," as well as his Glen Campbell: I'll Be Me documentary, both of which garnered much critical acclaim. His final album, Adios, was released in June.

Campbell died on Tuesday (Aug. 8), at the age of 81. To relive Campbell's fantastic country music career, click through the photo gallery above.