Janis Joplin & the Big Brother and the holding company.
Riff I :
(1st time)
E|-3--1--3-------------------------------------------------------5-3---0-3-0-
A|-----------2--3--4?5-4-5-------5--------5---3--2---2-2----------------
D|--------------------------------2------2--2----------------------------------
G|------------------------------------------------------------------------------
(2nd time)
E|--3--1--3------------------------------------------------------
A|------------2--3-----5-4-5----------2-3-2-------------------
D|-----------------------------------------------2-3-4-5---------
G|-----------------------------------------------------------------
Riff II:
(1st time)
E|----------------------------------------------
A|--3-----3------3-----5-----5------5-------
D|----1-1---1-1---1-----3-3---3-3---3-5--
G|---------------------------------------------
(2nd time)
E|----------------------------------------------
A|--3-----3------3-----5-----5------5-------
D|----1-1---1-1---1-----3-3---3-3---3-5--
G|---------------------------------------------
E|-----------------------------
A|--4-5----4-5---4-5--------
D|-------3------5------3-4-5-
G|-----------------------------
Riff I and repeat on and on the 1st time.
Riff II
Bridge:
G / D / C / G
Repeat riff I on and on.
Bridge II:
G / C / G / C
Riff II ends like this:
E|--------------------------------------------------------3---
A|-3-----3------3-----5------5------4-5---4-5---4-5---5--
D|---1-1---1-1---1-----3-3----3-3------3-----5----------5
G|-------------------------------------------------------------3-