Demi Lovato gave Little Mix an amusing send-off from her tour after pranking them in a snowman outfit.

The British girl group have been supporting the US star on her Neon Lights tour in North America but they have now left the jaunt to return home.

However, it seems former X Factor USA judge Lovato wasn't going to let Little Mix leave that easily.

She decided to prank the girls on Tuesday (March 18) on their last show by crashing the Minnesota stage wearing a snowman costume before joining in with their dancing.

The singer tweeted after the stunt: "Tonight's prank for @LittleMixOffic's last show on the #NEONLIGHTSTOUR...Hehe heart you girls!!!

Lovato's Neon Lights tour is due to continue until March 30 with Cher Lloyd and Fifth Harmony as support.

Watch Lovato as a snowman below: