Randy Jackson’s new adventure

Mariah Carey is tapping a longtime friend -- “American Idol� judge Randy Jackson -- to help her mix things up a bit on her “Adventures of Mimi� tour, which kicks off in August.

“With this tour, I’m going to be working on some different arrangements for some of the older songs, to kind of, like, give it a little more life to them,� Carey said. “That’s not to say they’re going to sound totally different and to freak anybody out ... [but] I love resinging songs to different music.�

Jackson, her musical director, might even join her on a few dates.