Melissa McCarthy is getting a major makeover for her big “Saturday Night Live” hosting gig.

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In a teaser promo for the upcoming episode, McCarthy lip syncs to the song "I Feel Pretty" from the musical "West Side Story" as she dances around Studio 8H. She then enters hair and makeup room and is miraculously transformed into White House press secretary Sean Spicer.

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"SNL" also created a highlight video to commemorate McCarthy's return to the show, featuring some of her best and funniest moments.

McCarthy hosts “SNL” on Saturday. Watch the teaser below.