Girls' Generation's 'kid leader' Taeyeon and maknae Seohyun made SONEs laugh with their latest antics.

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Taeyeon posted the creepy photo above with the message, "I think there's something behind me... Seohyun isn't scary at all." 

The two idol stars put a horror spin on the usual selca, entertaining fans, who commented, "Seohyun is so cute," "Seriously not scary at all. Taeyeon's expression is the best," "Look at Taeyeon's eyes," and more.

In other news, Girls' Generation will be performing at SM Entertainment's music festival on December 22 KST, 'SMTOWN Week'.

Would you be scared if Seohyun sneaked up behind you?