March 20, 2014 04:10:17 GMT
The British group is in the middle of performing a song when the former Disney star appears onstage dressing up as a snowman and shows hilarious dance moves.
Demi Lovato pranked Little Mix when she brought her "Neon Lights" tour to St. Paul, Minnesota on Tuesday night, March 18. The 21-year-old singer appeared onstage dressing up as a snowman to surprise the British group who was in the middle of singing a song.
At first, the girls from Little Mix weren't aware that Lovato intruded their performance. The former judge of "The X Factor (US)" then approached the ladies and showed off some hilarious dance moves alongside them.
She took a photo of her wearing the snowman costume while standing on the stage and later posted it on Twitter. "Tonight's prank for @LittleMixOffic's last show on the #NEONLIGHTSTOUR...Hehe heart you girls!!!," she wrote.
The Tuesday concert marks Little Mix's last show on Lovato's tour, which was lauched to support her latest album, "Demi". The former Disney star will now be joined by Cher Lloyd and Fifth Harmony for the upcoming dates.