Dua Lipa tries out new sound and new outlook with new album 'Radical Optimism'

Dua Lipa is floating in the ocean, the sun just beginning to set behind her. She looks strong, serene — save for the looming threat of a massive shark, fin just breaching the surface a few feet away.

The image is the cover of her third album, "Radical Optimism," out Friday. It is an apt visual representation for an album about finding and protecting your peace in dangerous waters — a thematic maturation for the Grammy-award winning pop superstar, who has long identified her sound as "dance-crying."

That...