CUBE's new girl group LIGHTSUM made their first-ever appearance in a variety show. Rookie girl group members guested in new SBS's Mobidic variety show hosted by Jungsik (co-host of Jessi's Showterview). But Lightsum wasn't alone, they've had support from a special guest Jo Kwon!

You can watch the whole episode above, don't forget to click CC to turn English captions on.