‘The Voice’ Finale: Christina Aguilera, Pitbull, Bruno Mars, Nelly Join Performance Roster

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Musicians Pitbull and Christina Aguilera perform during the Billboard Music Awards at the MGM Grand Garden Arena in Las VegasBy Tim Kenneally LOS ANGELES (TheWrap.com) – Christina Aguilera is returning to "The Voice" sooner than expected. The "Bionic" singer, who took a break from her coaching duties on the current cycle of the NBC singing competition but will return for its next cycle in the fall, will be back on the show for its season finale June 18. NBC also said Tuesday that Bruno Mars, Nelly, Pitbull and country duo Florida Georgia Line will also perform during the two-hour finale. …

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