Lykke Li earns first US Billboard No. 1 via Swedish House Mafia single

Lykke Li earned her first No. 1 on any US Billboard chart as Swedish House Mafia's 'Happiness Is So Sad' rose 4-1 on Dance Airplay, Billboard reported Oct. 19. The chart dated Oct. 24 measures US dance-format radio plays. The single, released July 30 via DANSA, gained 28% in plays in the Oct. 2-8 tracking week, according to Luminate.