"When Will I See You Again" is a song released in 1974 by American soul group The Three Degrees from their third album, The Three Degrees. The song was written and produced by Kenny Gamble and Leon Huff. Sheila Ferguson sang the lead, accompanied by Fayette Pinkney and Valerie Holiday. Billboard named the song #67 on their list of 100 Greatest Girl Group Songs of All Time.

It was one of the most successful recordings of the "Philly Soul" era. In the U.S., "When Will I See You Again" peaked at #2 on the pop singles chart. The song reached #1 on the adult contemporary chart, and #4 on the R&B chart in the autumn of 1974. In the UK, it fared even better, spending two weeks at the top of the UK Singles Chart in August 1974.
~Source: Wikipedia