NEW YORK: Erasure a year ago released a Christmas album, but with the latest holiday season upon us, the duo's biggest surprise was not a Yuletide carol but a celebration of synth-pop's roots.

But before you start demanding a refund, have a listen. Tomorrow's World is classic handbag electro with knobs on. From the yearning lovesick opener of “Be With You” to the closing sobathon “Just When ...

In this nostalgic and joyful one-off special, we tell the stories behind the greatest ABBA covers of all time by some of the biggest artists in the world. This features Cher, Andy Bell of Erasure, ...