Editing Lip sync (section)

===Using real singing and some lip syncing===
Some singers habitually lip sync during live performances, both concert and televised, over pre-recorded music and mimed backing vocals; this is known as singing over playback. Some artists switch between live singing and lip syncing during a performance, particularly during songs that require them to hit particularly high or low notes. Lip syncing these notes ensures that the performer will not be out of tune or strain their voice. Once the difficult portion of the song has passed, the artist may continue to lip sync or may resume singing live. Some artists lip sync choruses during songs but sing the main verses.{{Citation needed|date=January 2009}}