radioandrecords
Chart extract from radioandrecords.com

David’s historic debut at #2 on the Billboard Hot 100 was accomplished without national radio. Digital plays and purchases created an unprecedented spike for the song in the first week of official release. And according to those with knowledge about these metrics, an initial spike of this magnitude would not have been possible by way of David’s core fan base alone–the iTunes exposure, the Z100 premiere, and organic Internet proliferation (so-called “viral marketing”) helped expose many new listeners to David. The precipitous drop in charting after the spike was inevitable, given the limited radio play. Ever since radio stations started adding Crush to their playlists, however (new ones are still being added), the song has been steadily rising on the charts again.

For more detail on the charting of Crush, check out Seattlearchie’s column at FansofDavid.