Cera and Ali sing a cover of it must have been love in chorus:
# And it's a hard winter's day, I dream away.
It must have been love but it's over now.
It was all that I wanted, now I'm living without.
It must have been love but it's over now,
It's where the water flows, it's where the wind blows....
*FART*
Petrie: Sorry.....

Cera and Ali: Oh Petrie!
Cera: Thanks for running our song! When we sing about wind we don't need you to make a rude butt noise!
Petrie: Me say me sorry, me must stop eating those funny berry's.
Ali: Oh please go stand over there Petrie.. The smell's making me feel sick!