f(x) reveals Krystal's teaser photo for "Electric Shock"

After officially announcing their comeback and revealing the first concept photo, f(x) has revealed Krystal's teaser photo for "Electric Shock". Within the next four days, they will update their Facebook and official homepage with a teaser photo of each member. The first teaser revealed was a group photo, with the girls were wearing animal head masks over their heads.

The second teaser photo features Krystal in a blue sequined dress, wearing glasses, holding a orange toy gum and she sporting blue colored contacts.

Check out Krystal's teaser above. "Electric Shock" will be released worldwide on June 10th.