Given a choice between Lady Gaga and Stephen Colbert, I suspect the more cogent testimony, though oblique it may be, would be from Mr. Colbert. His comment about wanting tomatoes picked by an American, but sliced by a Mexican and served to him by a Venezuelan while he receives a Brazilian at a Chilean spa, provided more food for thought than the average bafflegab by committee witnesses.
On the other hand, I just hope that it doesn't set a precedent for the nature of subcommittee testimony. Once in a while you do need a taste of the counterintuitive to keep you honest. A steady diet of it, though, can quickly cheapen thinking.