New releases this week from a 17 year-old Swedish singer who is described as "Rihanna meets Robyn," a brand new band with a Jonas brother in it, and a song that was originally written for Adele from a pop star who never shows her face.

Zara Larsson, "Lush Life" (Epic/Record Company TEN)
DNCE, "Cake By The Ocean" ( Joseph Jonas/Republic)
Sia, "Alive" (RCA)