Carlile was musical guest on the Steve Martin and Martin Short-hosted episode.
The comedy vets hilariously read each other's eulogies to open the episode.
Yeah Yeah Yeahs announce that guitarist Nick Zinner is still recovering from pneumonia.
Thompson and Mitchell portray older versions of their hit 1996 sitcom characters who encounter an armed robber, while host Palmer comedically plays up her newly announced baby bump.
The singer-songwriter also appeared as musical guest during the Dec. 3 episode.
'That 'Kiki do you love me?' song ruined my damn life," host Keke Palmer says.
The actress hosted the NBC sketch show for the first time on Dec. 3.
This was the singer-songwriter's second appearance on the NBC sketch comedy series.
The 'SNL' veterans opened up about working with new castmembers Marcello Hernandez, Molly Kearney, Michael Longfellow and Devon Walker.
In this exclusive preview of Monday's special, Saturday Night Live alum Ana Gasteyer takes Swift's 2014 Hot 100 hit to the jazz club.
