Keller Williams has digitally released KEYS: A Collection of Grateful Dead Covers on Piano to Benefit the Rex Foundation. Williams put down the guitar and turned to piano to perform 10 Grateful Dead songs with his own creative spin.Track Listing:1. He’s Gone2. Can’t Come Down3. Terrapin Station4. Attics Of My Life5. Althea6. Brokedown Palace7. Wharf Rat8. Bird Song9. Row Jimmy10. Touch of Grey100% of the proceeds will go to The Rex Foundation, a non-profit started by the Grateful Dead to give out grants to various organizations assisting in a range of causes.KEYS is available on iTunes today.For more information on Keller William and his upcoming tour dates click here.To learn more about The Rex Foundation click here.