Swedish legends Max Martin and Shellback, the sole coproducers credited on Life of a Showgirl, have almost three decades of chart-steamrolling hits to their credit. Let’s run back the highlights.

“They make each other shine,” agrees Uchronia founder Julien Sebban, who, in his own home, opted for orange lacquer walls and a glossy blue ceiling. “Together, orange and turquoise feel vibrant yet ...