The choir sings "Serenada Lach" with Silvan. The song was made famous by the Yarkon bridge trio, in which Yehoram Gaon, who plays Silvan, was a member.
The title is based on the song "Dvarim SheRatziti Lomar" (Things I wanted to say) sang by Shay to Shani, and originally sang by Yehuda Poliker.
The vocal choir performing in the episode is called "B4".