"That's the last thing I want to do is go on up there and mess up, you know, in front of America"

This quote by Scotty McCreery reveals his fear of failure and his desire to perform well. He is likely describing an efficiency he is about to give in front of a big audience, likely in the United States. He is expressing his fear of screwing up in front of a big audience, and his desire to do well. He is likely feeling a lot of pressure to carry out well, and is fretted that he will not have the ability to meet the expectations of the audience. He is most likely feeling a lot of stress and anxiety and is attempting to reassure himself that he will have the ability to do well. This quote reveals his commitment to his craft and his desire to ensure he puts on a good program.