At times a particular song has a version in two languages.
While one (example: English) language is in LIVE, we have the option to keep the other language (Example: regional language) song in PREVIEW screen but when the other language song in PREVIEW screen is set to LIVE, the first language (english) song need to be searched again if need to sing back again.
Having a SWAP or toggle button between PREVIEW and LIVE screen would very helpful to solve this situation.