French music video director, graphic designer and singer-songwriter, Yoann Lemoine, worked with what American singer/songwriter on the music video Back to December on her third studio album?
Yoann Lemoine: Yoann Lemoine (born 16 March 1983) is a French music video director, graphic designer and singer-songwriter. Yoann Lemoine:  His most notable works include his music video direction for Katy Perry's "Teenage Dream", Taylor Swift's single "Back to December", Lana Del Rey's "Born to Die" and Mystery Jets' "Dreaming of Another World". Back to December: "Back to December" is a song written and recorded by American singer/songwriter Taylor Swift for her third studio album "Speak Now" (2010).
Taylor Swift