The rehearsal focused on learning the lyrics and melodies of "Summer Nights" and "You're the One That I Want" and adding harmonies. The singer worked on singing "Summer Nights" with strong high notes and learning backing vocals for "You're the One That I Want" with effective alto harmony. Feedback identified issues with posture, articulation, and final harmonies. Adjusting posture improved articulation and the singer came up with a solution for the high notes. By the end of rehearsal, the singer felt targets were achieved through practicing techniques like memorizing lyrics and considering harmony, articulation, and posture.