Conversation so far:
Was P.O.D.'s When Angels and Serpents Dance an album?
When Angels and Serpents Dance is the seventh studio album by Californian metal group P.O.D.
When was P.O.D.'s When Angels and Serpents Dance album released?
When Angels and Serpents Dance was released in 2008.
Tell me one famous song from P.O.D.'s When Angels and Serpents Dance album?
On August 4, 2007, the band played at Angel Stadium of Anaheim's annual Harvest Crusade where they revealed a new song entitled I'll Be Ready.“
Is there anything else noteworthy about P.O.D.'s When Angels and Serpents Dance album besides release date and a famous song?
It is the first album to include Marcos Curiel since Satellite and the first and only album to be produced for P.O.D. by INO/Columbia.

Question: How many copies were sold?
Self-contained rewrite: How many copies of P.O.D.'s When Angels and Serpents Dance were sold?