Disney Channel “Shake It Up” co-stars Bella Thorne and Zendaya will appear in an original movie anthology for the cabler, “Frenemies.”Stefanie Scott (“A.N.T. Farm”), Nick Robinson (“Melissa and Joey”) and Mary Mouser (“Body of Proof”) will co-star in the project, which follows three pairs whose friendships are put in jeopardy. The telepic will premiere Jan. 13, with a sneak preview launching on Disney Channel On Demand one week earlier. Daisy Mayer (“The Guru”) is directing a script by Dava Savel (“That’s So Raven”), Wendy Weiner and Jim Krieg. Leslie Morgenstein and Bob Levy are exec producing for Alloy Entertainment and Coin Flip Prods. “Shake It Up,” now in its second season, was through its first 26 episodes the No. 1 series ever in cable among tweens 9-14.