Conversation so far:
what is A beautiful World by Robin Thicke?
Beautiful World is the debut studio album by American singer-songwriter Robin Thicke.
Was the album Beautiful World by Robin Thicke successful?
The album's under-performance troubled Robin Thicke personally, but it proved enough to make him a wanted collaborator.
how many copies did the album Beautiful World by Robin Thicke sell despite its under-performance?
119,000 copies as of January, 2012
what number was A Beautiful on the billboard chart after selling 119,000 copies as of January, 2012?
The album received very little promotion and debuted at number 152 on the Billboard 200 albums chart
What did critics have to say about the album A Beautiful World by Robin Thicke?
Usher stated, I was blown away —I thought Beatles, Earth Wind & Fire, Shuggie Otis, Marvin Gaye — all in one album. Robin's got a soul you can't buy, man.“
Did Robin Thicke release any other albums between 1999-2003?
were any of Robin Thicke's songs on A Beautifulk World a success?

Question: who did he work with as a collaborator?
Self-contained rewrite: who did Robin Thicke work with as a collaborator despite the album A Beautiful World's under-performance?