'Dance Moms' Kid Star Says Maddie and I Are Gonna Be BFFs Like Selena and Demi!

"Dance Moms" star JoJo Siwa doesn't mind a little friendly competition with alum Maddie Ziegler at the moment ... 'cause she thinks they'll be pallin' around under one roof when it's all said and done.

We got the 13-year-old dancer out in Playa Vista Tuesday where she told us she and Maddie will end up being the next Selena Gomez and Demi Lovato.

Here's the thing ... Maddie's already moved on from "Dance Moms" to make waves with top-notch stars like Sia and Kristen Wiig. She was also a judge on this season's 'So You Think You Can Dance.' In short, JoJo's got some catching up to do.

Check out the clip -- JoJo's definitely got Maddie's back. Here's hoping Maddie feels the same way.