Lip Sync Battle / Season 4 S4·E7 Pentatonix Battle: Scott Hoying vs. Mitch Grassi vs. Kirstin Maldonado vs. Kevin Olusola Aired March 8, 2018 Share X f r w ⧉ Copied! Synopsis A cappella group members go head to head. ← S4E6 All episodes S4E8 →