Conversation so far:
What album of Snoop Dogg's had the best sales?
Snoop Dogg's 2000 album Tha Last Meal sold over 2.1 million copies
Did Snoop Dogg tour with that album release?
No, he didn't tour with this album
Are there any other interesting aspects about this article, besides Snoop Dogg's best-selling album and tours?
In 1999, his autobiography, Tha Doggfather, was published.

Question: Who else did he collaborate with?
Self-contained rewrite: Who else did Snoop Dogg collaborate with?