Tuning:
riff 1 repeat through intro and verse 1+2
G|--------------------------------------------------------------------------|
D|----7---7---7--7--7---7--7--7---7----11---11---11---11----11---11-----11--|
A|--0---0---0--0--0---0--0--0---0----0----0----0----0----0-----0-----0------|
E|--------------------------------------------------------------------------|
G|---------------------------------------------------------------------------------|
D|-----11----11--------------------------------------------------------------------|
A|--0-----0------------------------------------------------------------------------|
E|---------------------------------------------------------------------------------|
riff 2 chorus x2
[ Tab from: https://www.guitartabs.cc/tabs/k/kings_of_leon/knocked_up_btab_ver_4.html ]
G|--------------------------------------------------------------------------|
D|-----------------------------------------------0---2----------------------|
A|---4----3------0----4-----3-----0-------0---2------------0---2----7----4--|
E|-----4-----4-----------4-----4-------3----------------3-------------------|
he sings "where we gonna go" so here you play riff 1
riff 3 play for verse 3
G|--------------------------------------------------------------------------|
D|----7---7---7--7--7---7--7--7---7----11---11---11---11----11---12-----12--|
A|--0---0---0--0--0---0--0--0---0----0----0----0----0----0-----0-----0------|
E|--------------------------------------------------------------------------|
G|---------------------------------------------------------------------------------|
D|-----12----12--------------------------------------------------------------------|
A|--0-----0------------------------------------------------------------------------|
E|---------------------------------------------------------------------------------|
order
riff 1 intro plus verse 1+2
chorus riff 2 x2
where we gonna go riff 1
verse 3 riff 3
chorus riff 2 x2
where we gonna go riff 3
riff 3 for rest of song