Chris Martin took to Twitter to declare Ri-Ri's newest one of his "favourite songs." Not a shock: It's very close to Coldplay soul, a striking turn into lustrous power balladry after a string of filthed-up R&B sexcapades. Written by arty Aussie diva Sia and produced by Benny Blanco and Norwegian hitmaker Stargate, it's glassily curvaceous and strikingly spare: "Find light in the beautiful sea/I choose to be happy," she sings over an ice-flow piano and cascading beat. If she really has started things back up with that other Chris, then this hits the perfect, vaguely creepy note of against-the-odds hope for the occasion.

“All Along the Watchtower”

Jimi Hendrix got hold of Bob Dylan's early John Wesley Harding tapes and in late 1967 recorded a version of "All Along the Watchtower" with the Experience in London. Dissatisfied with that first development, Hendrix brought those tapes with him to New York in early 1968 when he began work on Electric Ladyland. Eddie Kramer, Hendrix's engineer at the time, told Rolling Stone that Hendrix "was still looked upon by his basically white audience as the mammoth black guitar hero. There was a constant fight within him to expand himself." Hendrix's successful take on Dylan's work has long been recognized by the songwriter. "I liked Jimi Hendrix's record of this and ever since he died I've been doing it that way," Dylan wrote in the liner notes to his Biograph box set. "Strange how when I sing it, I always feel it's a tribute to him in some kind of way."