Austin & Ally, Season 3

(Austin sees Ally walk into prom, and he smiles)

Austin:
Trish, I've made a huge mistake. I'm not supposed to be here with Piper, I'm supposed to be here with Ally!

(Austin turns around and sees that it's Carrie behind him, much to his shock.)

Austin:
(Shocked) And, you're not Trish.

Carrie:
You don't wanna be here with my sister?

Austin:
Please don't say anything to Piper, I don't wanna ruin her prom!

(Piper walks up to Austin and Carrie.)

Piper:
(Smiles) You know what, Austin? I'm having a really great time. Even if your pores are huge. (She giggles and hugs him.)

Carrie:
Piper, there's something I have to tell you.

(Austin has a guilty look on his face, and the episode ends with 'To be continued...')