Conversation so far:
Who did Robin Thicke go on tour with?
Jennifer Hudson
What year did Robin Thicke tour with Jennifer Hudson?
2009
What year had Robin Thicke toured before the tour with Jennifer Hudson?
2008
What did Robin Thicke do later that year?
What was it called?
What was the date?
What was a song single of Robin Thicke's called?
Lost Without U“

Question: Who was on one of his tracks
Self-contained rewrite: Who was on one of Robin Thicke's tracks?