He's performed it with with capos on 2 and 3. I think he uses it on 2 the most though. Riff 1: e||----------------|----------------|----------------|----------------|| B||--3-----3-------|--2-----2-------|--0-----0-------|--0-----0-------|| G||----4-----4---4-|----2-----2---0-|----1-----1-1h2-|----1-----1---0-|| D||------4-----4---|------2-----2---|------2-----2---|-------2----2---|| A||2---------------|0---------------|----------------|----------------|| E||----------------|----------------|0---------------|0---------------|| Riff 2 (only appears after the chorus in some versions): e||--2-------------|--------------|----------------|----------------|| B||----3---5-2-----|--2-------2---|0-----0---------|0-----0---------|| G||--------------4-|----2---2---2-|--1-----1---1h2-|--1-----1---0---|| D||----------------|------2-------|----2-----2-2---|----2-----2-----|| A||2-----2-----2---|0-------------|----------------|--------------0-|| E||----------------|--------------|0---------------|0---------------||