Ready or not: Taylor Swift has released the official titles of her songs off her highly-anticipated sixth studio album, Reputation . And most notably among the 15-song tracklist is the 27-year-old singer's (one and only) collaboration with BFF Ed Sheeran and rapper Future, titled "End Game." The forthcoming single will mark Swift and Sheeran's second single together following 2012's "Everything Has Changed" off her Red album. Four songs have already been released including, "…Ready For It" (track 1), "Look What You Made Me Do" (track 6), "Gorgeous" (track 8) and “Call It What You Want” (track 14). RELATED: Everything We Know About Taylor Swift's Reputation The tracklist, which Swift posted on Instagram just hours after it was leaked, also listed production credits of which the Grammy winner is tagged as executive producer. Co-producers include Jack Antonoff (“...
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