No bass at start.

G|------------------|
D|------------------|
A|------------------|
E|-00-----33----6-6-| When she starts singing 'Unnnnddddeerrrr....a floorboard world'

No bass when she's singing 'I got your secret and I sure ain't gonna keep it'

G|---------------------------------|
D|---------------------------------|
A|---------------------------------|
E|-0-0-0-0-0-0-0-0-3-3-3-3-3-3-6-6-| Chorus.

Keep playing these two parts, whenever they need to be played.