Demi Gets Spiteful!

This is going to be a LOOOONG tour for Joe Jonas!

While Demi Lovato was performing in Rio De Janerio over the weekend, she decided to take a little jab at her now ex-boyfriend, Joe Jonas.

While singing her song "Solo" Demi changed a lyric from "why don't you stick to acting" to "why don't you stick to tambourine?"

Ouch! Take that, heartbreaker!

Check out her impromptu hit to Joe's pride in the video above! (mark 1:15)