1. Mumford & Sons

"I Will Wait" (2012)

With its raging banjos, four-four stomp and romantic/spiritual lyrics, this is the ultimate folk-pop smash.

2. Avicii

"Wake Me Up!" (2013)

Avicii combined retro soul and retro folk with crooner Aloe Blacc for this EDM smash, which has sold 4.7 million downloads, according to Nielsen Music.

3. Of Monsters & Men

"Little Talks" (2011)

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