 Nyora kuenderera kweiyi ndima - Muna 2014, Kelly akashanda naBraun pane rake rekutanga dambarefu raaive naro kubva kuna Toby Gad, Max Martin, naEd Sheeran. The kutungamirira chete kubva album, Nobody Love, yakabudiswa musi February 8, 2015. Yakanyorwa naRickard Goransson, Max Martin, naTori Kelly amene. Kelly akaita Hapana Rudo pa2015 Billboard Music Awards. Iyo album, yakanzi Unbreakable Smile, yakaburitswa muna Chikumi 23, 2015, uye yakatanga panhamba mbiri pa Billboard 200. Kelly akaita Tinofanira kunge Takanga Tiri pa2015 MTV Video Music Awards. Muna Gumiguru 2015, Kelly akafukidza rwiyo Colors of the Wind kubva kuPocahontas pa We Love Disney album. Hollow yakaburitswa musi waGumiguru 22, 2015 seye yekutanga imwe kubva kuchinyorwa chitsva che Unbreakable Smile. Mumwedzi iwoyo, Kelly akava mumiriri weWilliam Rast, mutsetse wenguvo wakavambwa naJustin Timberlake. Mukupera kwa2015, Kelly akagamuchira mazita e Best New Artist pa 58th Grammy Awards. Iye akaita pamhemberero pamwe muimbi Chirungu James Bay. Akava muimbi wokutanga munhoroondo kuita rwiyo rwechiKristu rwepop paGrammy Awards. 