[Doofenshmirtz's Version]
Na, na, na
Na, na, na
Na, na, na-a-a-a-a!

[Irving's Version]
Deh, deh, deh!
Dun, dun, dun, dun, dun, dun, dun, dun, dun!

[Candace's Version]
Bum, bum, bum, bum, bum, bum, bum, bum

[Phineas' Version]
Dah dah dah!
Duh! Dah dah dah!
Duuuuuh!
Bum bum bum bum bum bu-u-u-u-um!