This song, which reached No. 6 on Billboard‘s Hot 100, was the duo’s fourth top 10 hit. It was the lead single from their first full-length album, Memories…Do Not Open. LISTEN HERE. (Photo by Greg Allen/Invision/AP)
Bruno Mars, the Chainsmokers, Justin Bieber, and Quavo each have two of the 20 bestselling songs of the first six months of 2017. But none of those stars came out on top. Who did? Read on. Here are the 20 bestselling digital hits of the first half of the year, according to Nielsen.