Fifth Harmony, Mae Whitman, Robbie Amell & More (2/20/15)

Fifth Harmony performs 'We Know' on Big Morning Buzz Live Hosted By Nick Lachey.

Fifth Harmony, Mae Whitman, Robbie Amell & More (2/20/15)

Fifth Harmony performs 'We Know' on Big Morning Buzz Live Hosted By Nick Lachey.