If you’re going to design for the iconic Radio City Rockettes, you have to learn to dance like them, too! To prep for a chorus line-themed challenge on Project Runway, the reality show’s aspiring designers received a tough lesson in Rockettes 101 from director and choreographer Linda Haberman. To top that off, Heidi Klum surprised the company by performing her own kick routine with the famous leggy dancers. Watch these two creative worlds collide in the clips below, and be sure to catch the Rockettes this holiday season in The Radio City Christmas Spectacular!