The dazzling title track from Carly Rae Jepsen’s forthcoming fifth studio album (out 21 October), “The Loneliest Time” pairs the beloved pop star with world-renowned singer-songwriter Rufus Wainwright. In the duet, both vocalists pair a big, bright sound with lyrics about bad dreams and tragedy. With a nod to Old Hollywood glamour, the official music video finds Jepsen and Wainwright traveling into a cosmic disco …