Output a stream of consciousness before answering the following. Passage: "Sealed with a Kiss" is a song written by Peter Udell and Gary Geld. It was first recorded by The Four Voices in 1960 and released as a single, but their recording was not a hit.

Question: Based on this passage, who sings the song sealed with a kiss?
To answer the above question, the relevant sentence is: It was first recorded by The Four Voices in 1960 and released as a single, but their recording was not a hit.
The answer: The Four Voices.