A party is coming up..?

You were talking to your best friend in the halls, and while the conversation was going, you changed the subject about a party you were starting next Saturday. It will be fun though!

Then, you heard someone gasp loudly and you realized it was Petunia, the popular girl, who gasped. Petunia ran up to you and spoke up.

"Did you say... a party?!"

Petunia then grinned.

"I'm in!"

Wow, she really loved parties, so what will you say next?