Preliminary info and rehearsal pictures: ABDC Season 7 Finale

MTV has not released much information about the live finale for America's Best Dance Crew on Wednesday June 13. What we think we know, based on photos, Twitter, the MTV site, and Facebook:
- It is definitely Katy Perry Week, though we don't know if she'll show up
- Past ABDC champions Poreotics, We Are Heroes, and IaMmE will be performing. We haven't heard about any of the other champions appearing
- The past champions will dance in group numbers with current contestants
- It doesn't look like they'll have a reunion of all the crews from Season 7.
MTV posted a few behind-the-scenes photos of the rehearsal, including the one here of Mami (We Are Heroes) practicing with Charlize (8 Flavahz). Click here to see the rest of the photos.