Music producer Shellback is making headlines after Taylor Swift revealed that she collaborated with him on her upcoming album The Life of A Showgirl. This week, the pop star sent Swifties spiraling when she announced her 12th studio album, which will be released October 3. The songs were produced by Shellback and Max Martin, both of whom are Swedish and regularly collaborate with American pop artists from Swift and Britney Spears to Ariana Grande and Adele. The last time Swift worked with Martin and Shellback was for 2017's Reputation.