Former En Vogue singer Dawn Robinson threatens to sue the Lifetime network if it airs a holiday themed movie about the group that doesn’t include her character. Lifetime is scheduled to premiere ‘An En Vogue Christmas’ this weekend. The fictional movie follows a family that convinces the quartet to reunite to save a local concert house. But, only two of the original members are in the film. Terry Ellis and Cindy Herron. They’re joined by Rhonda Bennett, who was added in 2003 to replace Robinson. Terry, Cindy and original member Maxine Jones had been performing as the trio EV until Bennett arrived. According to TMZ, Dawn may have a difficult time suing Lifetime, because she gave up all ‘En Vogue’ rights years ago, after first leaving the group in ’97.