Happiness Is So Sad / Fireflies (3DGARFAST MASHUP) - Swedish House Mafia vs. Martin Garrix & U2

"Happiness Is So Sad vs. Fireflies (3DGARFAST MASHUP) - Swedish House Mafia vs. Martin Garrix & U2" Inspired by the latest track from Swedish House Mafia, blended with the beautiful “Fireflies” vocal performed by Martin Garrix! • Full Mashup Version:   / happiness-is-so-167166058   • Join my Patreon community ❤️ for more exclusive content and early access:   / 3dgarfast   ━━━━━━━━━━━━━━━━━ TRACKS USED • Swedish House Mafia, Lykke Li - Happiness Is So Sad • Martin Garrix & U2 - Fireflies ━━━━━━━━━━━━━━━━━ SOCIALS » https://linktr.ee/3dgarfast #SwedishHouseMafia #HappinessIsSoSad #Fireflies #MartinGarrix #U2 #SHM #Mashup #ProgressiveHouse #FestivalEDM #EDM2026