Nielsen SoundScan International has added over-the-air full-track digital download sales to its tracking of worldwide digital music sales. The company is working directly with mobile operators in Spain, Ireland, Denmark, Sweden and Norway to collect the information and compile it into its broader worldwide digital music sales data.

For 2006, Nielsen SoundScan International tracked more than 81 million digital downloads from all sources. The top five pan-European selling artists were, in descending order, Gnarls Barkley, Shakira, Scissor Sisters, Snow Patrol and Justin Timberlake.