Christina Aguilera [1] did impressions of some of her fellow pop stars in a hilarious video for The Voice, which was posted to YouTube on Tuesday. In the clip, she spoofs Lady Gaga [2], Miley Cyrus [3], and Sia, as well as Britney Spears [4] — whom she impersonated earlier this year on The Tonight Show [5] — Cher, whom she worked with in 2010's Burlesque, and Shakira [6], who replaced Christina as a coach on The Voice in season six. Watch the video above now, and let us know: does Christina nail her pop star impressions?