JoJo Siwa still has on her mind all the time. The singer and TV star opened up to ET about her time on the show, and her friendship with dance partner Jenna Johnson, at the iHeartRadio 102.7 KIIS FM Jingle Ball concert on Friday.«I miss it so much, it's actually insane,» JoJo shared with ET's Denny Directo on the red carpet outside The Forum in Inglewood, California. «I text Jenna every day about how much I miss it.