While Swift was completing her fourth album in the summer of 2012, Taylor invited her to appear as a special guest during his Tanglewood set—they performed "Fire and Rain", "Love Story" and "Ours" together.[171] Taylor, who first met Swift when she was 18, has said that, "we just hit it off. I loved her songs, and her presence on stage was so great."[172][173]
During this period, Swift also contributed two original songs to The Hunger Games soundtrack album. "Safe & Sound" was co-written and recorded with The Civil Wars and T-Bone Burnett.[174] John Paul White has said working with Swift was "a revelation ... It truly was a collaboration."[175] It was released as the album's lead single and, as of January 2013, has sold over 1.4 million copies in the U.S.[176] It won Best Song Written For Visual Media at the 2013 Grammy Awards and was nominated for Best Original Song at the 70th Golden Globe Awards.[177] Swift's second contribution to the album, "Eyes Open", was written solely by the singer and produced by Chapman.[178] In addition, Swift contributed vocals to "Both of Us", a Dr. Luke-produced single from B.o.B's second album Strange Clouds.[179]