Swedish House Mafia's 'Happiness Is So Sad,' featuring Lykke Li, has reached number one on the Dance Airplay chart, marking their fourth such achievement. The track, recently accompanied by a music video filmed across 25 devices at a Guadalajara house party, was nearly abandoned due to label skepticism, according to Axwell. Meanwhile, the group commemorated the 14th anniversary of their debut album 'Until Now' and the 16th anniversary of 'Miami 2 Ibiza' with Tinie Tempah.