Pop singer Meghan Trainor will guest-star on "Undateable‘s" Oct. 30 episode, creator Bill Lawrence tweeted Thursday.

"We are bringing the #UndateableLive promotion/full access today and tomorrow. Fun band this week, @SaintMotel and @Meghan_Trainor next..."

http://tvline.com/2015/10/22/lip-sync-battle-holiday-special-spike/