Provide a brief biography of Christina Aguilera, highlighting her career and why she is frequently imitated.
Since her debut in the late 1990s, Christina Aguilera has been defined by her multi-octave range, heavy use of melisma (vocal runs), and a signature, gritty chest-voice belt. CelebrityMixUp - Christina Aguilera -Jessica Lynn-
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Both artists are known for their theatricality and command of the stage: and a signature