Guitar:

G5-355xxx
C5-x355xx
D5-x577xx
- = don't play

chorus:
-
Who's that band?
G5
Party Crashers!
-
Who's that band?
G5
Party Crashers!
-
Who's that band, who's that band?
G5
Party Crasher, Party Crasher, Party Crasher, Party Crashers!

verse:
G5      C5
Crash the Disco
G5       D5
Crash the dance
G5       C5
Crash the party
G5        D5
Crash your PANTS!

chorus

Crash the concert
Crash the prom
Crash the Wedding
Crash your MOM!

chorus

outro:
(scratch your strings at the very end, and play G5 and let it ring)
Party Crashers (x10)

bass:
play 3rd fret E string when guitar plays G5
play 3rd fret A string when guitar plays C5
play 5th fret A string when guitar plays D5