On the first week I did 500 thousand
Gold in the spring, and diamond in the fall

from B.o.B (Ft. Eminem & Hayley Williams) – Airplanes, Pt 2 Lyrics on Rap Genius

Meaning

Unfortunately this did not quite happen. While his album did spawn some very successful singles, the album only sold 84 000 units in its first week instead of the 500 000 he had hoped for. As of mid-summer the album has yet to even go gold (=500 000 units sold)

To be fair, these goals are quite lofty (especially diamond, which is 10 million units sold). B.o.B has the third best selling hip-hop album of 2010 so far (behind Drake and Eminem) which is an admirable achievement

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