Nico Muhly and Bryce Dessner, began performing their classical project Planetarium, a song-cycle based around the planets in our solar system in countries such as England, The Netherlands, Australia and France from March to July 2012. On October 2, 2012, it was announced that Stevens would release a second set of Christmas albums, titled Silver & Gold: Songs for Christmas, Vols. 6–10, on November 13, 2012. Silver & Gold contains 58 songs, allowing for a total of 100 when combined with his first set of Christmas albums, Songs for Christmas. To support this new release, Stevens performed in 24 cities around the United States for his 2012 tour titled "The Sirfjam Stephanapolous Christmas Sing-a-Long Seasonal Affective Disorder Spectacular Music Pageant Variety Show Disaster". On December 11, 2012, Stevens released Chopped and Scrooged, a Christmas-themed hip-hop mixtape featuring music from Silver & Gold. As a part of Joyful Noise's 2013 Flexi Disc Series, Stevens and Cat Martino, of Stranger Cat, recorded the single "Take the Time". Martino has contributed to many of Stevens' past projects, including The Age of Adz. On March 18, 2014, Stevens released the self-titled album, Sisyphus, with Son Lux and rapper Serengeti. Carrie & Lowell (2015–2017) On January 12, 2015, Asthmatic Kitty Records announced that Stevens would release a new album called Carrie & Lowell. Stevens shared the first single from the album, "No Shade in the Shadow of the Cross", on February 16, 2015. Carrie & Lowell was released on March 31, 2015. The album garnered critical acclaim upon its release. Stereogum placed the album on its best albums of the decade list in 16th place and described it as "an elegant heartbreaker of an album", while Consequence of Sound ranked it the 43rd best album of the decade, calling it "a special brew that makes even the most intimate personal moment feel parabolic". The album follows the nuances and trials of life with Stevens' mother, Carrie, who was diagnosed bipolar and schizophrenic, was addicted to drugs, and abandoned him when he was a year old; it also includes Stevens' stepfather, Lowell Brams. Stevens also stated that the songwriting for the album was incited by his process of grieving and coming to terms with his and his mother's relationship following his mother's death due to stomach cancer in 2012. On January 26, 2015, Asthmatic Kitty Records announced a tour of North America, which began in April