Sing your part along with the recording. Baritones, note that there is a Tenor and Bass part in this recording, as there is no recording with just a Baritone part. Pay close attention to dynamics, diction, and the feeling that the choir evokes. This is an upbeat, energetic song and should sound so. Listen to how the accomplish this. Finally, listen to the second half of The Defining Moment (when the parts are split) and see how your part fits in.