The magic million is within sight of Lil Wayne's "Tha Carter III."

The Cash Money/Universal album continues to lead Nielsen SoundScan's Building chart, released today (June 13). Based on the new tally, the album could sell a million copies by the time SoundScan closes out its tracking week on Sunday night.

Unweighted sales of "Carter" through the close of business Thursday, June 12 stood at 630,000. That's the largest number the Friday Building chart has seen since it began in September.

The last album to rack up a similar number on a Friday Building chart was Kanye West's "Graduation" (Roc-A-Fella/Def Jam), which posted a 600,000 figure the Friday of its release.

"Graduation" would go on to shift 957,000 in its first full week.

Based on how "Graduation" sold over its first weekend, Wayne's "Tha Carter III" has the potential to sell one million units in its first week. The last album to sell a million copies in a week was 50 Cent's "The Massacre"
(Shady/Aftermath/Interscope), when it bowed with 1.1 million in March 2005.

Billboard estimates the nine merchants who report to Nielsen SoundScan's Building chart -- Trans World Entertainment, Best Buy, Circuit City, iTunes, Starbucks, Borders, Target, Anderson Merchandisers and Handleman Co. -- comprise about 80% of all U.S. album sales.