The Billboard chart will now include weekly data from AOL Music and Yahoo Music. Digital delivery began playing a role in the chart’s composition in February of 2005, when Billboard took into account the sale of digital tracks measured by Nielsen SoundScan from a panel of online merchants.

Billboard associate director of charts Silvio Pietroluongo, who manages the chart introduced the new formula.

"The introduction of digital sales to the Billboard Hot 100 chart in 2005 was exactly the jolt the chart needed at the time," said Pietroluongo. "With the addition of AOL Music and Yahoo! Music, Billboard continues to keep stride with today’s digital trends while maintaining the chart’s traditional balance."

The new Billboard formula will include the radio audience, which will make up 55 percent of the chart’s total points. Digital sales will account for about 40 percent and streaming media will make up 5 percent.  Physical sales of singles will account for less than 1 percent of the chart’s new formula.