IFPI publish a global recording artist chart to accurately capture the popularity of artists across streaming channels, alongside digital and physical album and singles sales. The 2015 chart is only the third time the chart has been compiled. The independently verified chart includes sales of albums — across digital, CD and vinyl formats; singles, both downloaded and physical; on-demand streams and music videos. It includes all the music of each artist featured, not just one track or album. It uses track and album equivalents to combine measurements of downloads, physical sales and streams.