Alanis Morissette is no stranger to a heartfelt Christmas cover. She’s previously released renditions of classics like “Little Drummer Boy” as well as riffs on modern carols such as Wham!’s “Last Christmas” and “Happy Xmas (War Is Over)” from John Lennon and Yoko Ono. But Good Weather for Immaculate Conception, her first-ever full-length holiday album, ties a collection of these songs up with a bow, with Morissette’s resonant voice soaring through the standards (“O Holy Night”) and some unexpected gems (her version of Joni Mitchell’s “River” is simply stunning). Some friends come along for the sleigh ride: Brandi Carlile and Steve Martin join her for “Beautiful Star of Bethlehem,” Amythyst Kiah turns up the power of “Momma Mary,” Joy Oladokun strikes a calming emotional chord with “Silent Night,” and Martin Short pulls at the heartstrings for a stirring duet of a grand finale with “Merry Christmas.” Good Weather for Immaculate Conception gifts her own original contributions to the Christmas canon, too: “To an Empath at Christmas Time” affirms the gnarly, complicated feelings that represent the holidays for some, while the hard-rocking “Christmas on the Dancefloor” injects some hedonism into the festivities (“And all I have to give is flow inside this body/I know it’s not the same as frankincense and myrrh/And how I wanna pray is by sweating with my buddies/To celebrate his birth”).