(LIAM)
It feels like we've been livin' in fast forward
Another moment passin' by
Pa-pa party all night
The party's ending, but it's now or never
Nobody's going home tonight
Pa-pa party all night

(HARRY)
Katy Perry's on replay, she's on replay
DJ got the floor to shake, the floor to shake
People going all the way, yeah all the way
I'm still wide awake
 [bad word]  Let's go crazy,crazy crazy till we see the sun
I know we only met but let's pretend it's love
and never never never stop not for anyone
Tonight let's get some and live while we're young
oh oh oh oh oh oh oh
and live while we're young
oh oh oh oh oh
tonight let's get some

Niall: . Yeah,we'll keep doing what we do, just pretending that we're cool so tonight

I wanna stay up all night, and jump around until we see the sun
I wanna stay up all night and find a girl and tell her she's the one
Well don't change the feeling
Don't let it go, 'cause we got the flow now
Get outta control
I wanna stay up all night and do it all with you
Up, up, up all night like this, all night
Up all night like this, all night
Up all night

Harry: and live while we're young