Smosh's Seriously Super Stupid Sleepover was a show on Smosh 2nd Channel. Debuting September 9, 2015, the show was hosted by Courtney Miller and Olivia Sui. Episodes consisted of Courtney and/or Olivia, dressed in pajamas, doing different, random, most of the time odd, activities featuring an array of guests from other YouTubers, such as The Bath Boys to Smosh cast members, such as Ian and Anthony. The show was one of the two shows new shows used to replace Mari's Smosh Pit Weekly, the other being Put it in My Mouth, hosted by Noah Grossman. The show ended on May 27, 2017 after 45 episodes. The idea for the show came after Mari admitted that is how Smosh Pit Weekly was originally planned to be filmed.