‘7 Little Johnstons’: Liz & Brice Celebrate Leighton’s First Birthday with Family (Exclusive)

Leighton’s birthday is here, but it isn’t all smooth sailing at the Johnston household. In this exclusive clip from this week’s episode of “7 Little Johnstons” Leighton gets frightened by Trent’s sister, Heidi. “7 Little Johnstons” airs Tuesdays at 10 p.m. ET/PT on TLC.