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Demi Lovato has found a way to say her goodbyes to British girl group Little Mix, as they close their portion of the dates as opening act on her "Neon Lights" tour. 

The pop star has tweeted a photo from the group's final set on her tour, during the concert in Minnesota on Tuesday night.  Demi is shown dressed up in a snowman costume standing behind the girls as they dance center stage.  Fan videos show an incognito Demi creeping up behind them and imitating their dance moves.  

Check it out below!