Adele’s ’21’ Earns Biggest Sales Gain In SoundScan History

Not counting albums that were released on an irregular schedule, or, arrived early due to street-date violation sales, Adele’s “21” achieves the largest weekly unit gain for an album since Nielsen SoundScan began tracking data in 1991. It earned a staggering 493,000 gain last week — moving from 237,000 copies last week to 730,000 this week.