Last night on The Voice season finale, Christina Aguilera showed off her master impersonation skills. She did her best Miley Cyrus, Britney Spears, Lady Gaga, Sia, Shakira and Cher in this video promoting the show. Her Miley is totally spot-on! Here’s a thought, NBC: maybe Xtina should be a judge on a new show called The Impersonator? Ya? Sounds good?