Conversation so far:
who were carrie and lowell?
On January 12, 2015, Asthmatic Kitty Records announced that Stevens would release a new LP called Carrie & Lowell on March 31, 2015.
was this album successful?
The album met with critical acclaim on release, receiving a 9.3 from Pitchfork under "best new music", and an initial score of 90 from Metacritic.
did it have any hit singles?
CANNOTANSWER.

Question: did they go on tour?
Self-contained rewrite: Did Sufjan Stevens go on tour?