The West concert capped a week of lavish parties and entertainment put on by corporate lobbyists who push legislation and regulatory issues in Washington.
Watch the final Money Trail report from Denver tonight on World News with Charles Gibson, and all next week from Minneapolis.
Sen. Barack Obama has repeatedly criticized the role of special interest and corporate lobbyists and has refused to accept any campaign contributions from them or allow any of them to work in his campaign.
But Obama's position stood in stark contrast to the reality in Denver where lobbyists and their corporations put up $50 million to pay for the cost of the convention itself and millions more for scores of private parties.
This post has been updated. The previous version erroneously attributed the statements made by Neil Portnow of NARAS to RIAA president Cary Sherman. Sherman did attend the event, but did not speak to reporters there.