Page 13. Remaining long format.

Yeah it does have 14 .5 m sales in the USA on the Wikipedia site of the album

I found two additional sales numbers:

NSYNC's self-titled album sold 300,000 copies in Germany according to this site but it already sold more than 300,000 in 1997 (Billboard December 6, 1997).

The Winter Album also seems to be too low.

It supposedly sold 60,000 copies worldwide but it already sold 159,000 as of 1999 (Billboard March 20, 1999).