Taylor Swift's 4 variants of her 'Tortured Poets Department' album: Get to know each one

Taylor Swift is keeping anticipation high surrounding her new album, The Tortured Poets Department, as she revealed a fourth and final version of the album during her concert in Singapore over the weekend.

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Since announcing the arrival of her new studio project to the world following her 13th GRAMMY win last month, Swift has continued to keep the surprises coming as she’s revealed there there will be four different versions of the album. Each one unique with its own aesthetic and bonus song in addition to the 17 original tracks and two collaborations they’ll all have in common.

"I kind of wanted to show you something that nobody else has seen," Swift said to the crowd at her second show in Singapore over the weekend. She proceeded to reveal the fourth and final version of The Tortured Poets Department named " The Black Dog ,” after its unique bonus track.

Previously announced versions of The Tortured Poets Department include ; The Manuscript , The Bolter and The Albatross .

While pre-orders for The Bolter and The Albatross are no longer available, fans can pre-order The Black Dog version through March 6 on Swift’s website . The Manuscript is also still available for pre-order as it marks the original version of the album.

All four versions will be available in entirety on April 19 — the official album release date.