American Idol is going country next week. According to The Orlando Sentinel, on next Tuesday's show, Shania Twain will mentor the six finalists on songs she has performed. On Wednesday's results show, Lady Antebellum will sing "Need You Now." Also that night, Rascal Flatts, making their third appearance on the show, will deliver "Unstoppable," and the trio will also sing with Shakira on her song "Gypsy." The Tuesday show starts at 8 PM, ET on FOX; the results show begins at 9 PM, ET Wednesday