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Tess and Ali body swap! <\/span>Christina Aguilera<\/a> is paying homage to her <\/span>Burlesque<\/span><\/em> co-star <\/span>Cher<\/a> with her spot-on Halloween costume. The 42-year-old pop star took to Instagram to share a slew of photos and video of herself dressed as the legendary 77-year-old performer for the holiday.\u00a0<\/span><\/p>\n Kicking off the look with a video of her lip-syncing Cher’s line from the 2010 film, the pop star captioned the post, “Tess & Ali 4EVER \ud83e\udd0d\u267e\ufe0f\ud83e\udd0d”<\/span><\/p>\n Aguilera also donned a series of Cher’s most iconic looks including a black leather bodysuit and fishnet tights, a black sheer rhinestone jumpsuit, and more.\u00a0<\/span><\/p>\n “On my favorite day of the year it’s only right to turn back time and tribute the OG trailblazer @cher,” Aguilera captioned the post. “Cher’s message through her music and style has left a permanent mark on the world and to this day, I still can’t believe I had the opportunity to work with such a legend!!!! No one could ever fill the shoes of the great & powerful Cher. The love and respect I have for you is endless \ud83d\udda4\u2693\ufe0f.”<\/span><\/p>\n She also shared a behind-the-scenes video of herself rocking the various ensembles and large black curly wig set to Cher’s hit “If I Could Turn Back Time.”<\/span><\/p>\n “Honoring the LEGENDARY QUEEN @cher \ud83e\udd0d,” she captioned the post.\u00a0<\/span><\/p>\n Aguilera’s costume tribute comes amid reports that the “Beautiful” singer is adapting the beloved film for <\/span>a stage musical<\/a>.\u00a0<\/span><\/p>\n