Well, not technically. Nineties country superstar Shania Twain recently wrapped up a two-year residency as a Las Vegas headliner, whose show included dancers, a 13-piece band, a motorcycle, and even a trained horse. (A main attraction and a mane attraction!) This is its captured-for-posterity, shown-after-the-fact TV edition, and why ABC is premiering this one-hour special on a Saturday night, I’m not sure. But here it is. I hope she’s in good voice after all these years, and doesn&r