Loretta Lynn turns 84 today, April 14th. But the Country Music Hall of Fame member isn't resting on any laurels. Instead, she's found new creative spark, recording a slew of songs for a series of proposed releases. The first: Full Circle, her magnificent new album released in March. In honor of Lynn's birthday, we look at her 20 essential songs, from her autobiographical signature "Coal Miner's Daughter" and the empowering "The Pill," to her full-throttle duet with Jack White, "Portland, Oregon."