Joy is the next one up for Red Velvet's 'Rookie' comeback teaser images!

Joy's teasers follow the same 'Where's Waldo?' and 'I Spy' book concept, and going through Red Velvet's website puzzle reveals the photos below. Red Velvet's 4th mini album 'Rookie' will include 6 tracks and is due out on February 1 KST.

Check out Joy's teasers below!