Demi Lovato teamed up with Marshmello for a heartfelt anthem about mental health, David Guetta and Sia dropped an 80s-tinged bop about the unifying power of love, and Florida Georgia Line delivered a perfect country tribute to the last nights of summer.Plus, Janelle Monáe released her first new music since 2018's — a powerful political anthem for the new documentary — and Usher got candid about his «Bad Habits» in a new single.Read on for some of our favorite recommendations for new songs and