Diana and the Highlands Voices prepare to do whatever it takes to come back from the previous week's loss; Deke and Stay Tuned plan a song that speaks to an iconic high school experience.

Deke tries a new tactic and decides to play it safe in the semi-finals; Diana hopes to take her group to the next level with some professional help.

Diana and Highlands Voices put everything they have into this week's performance; after highs and lows throughout the season, Deke's group relies on their emotions in an effort to win the title.