"Don't Stop Believin'" was also the cast's best-selling single, and had sold over 1,000,000 copies in the US by October 2010, counting a combination of sales from the original release (921,000) and the rerecording for the season one finale (84,000).
"Don't Stop Believin'" var også den albummets bedst sælgende single, og har solgt 1.005.000 eksemplarer i USA, en kombination af salg fra den oprindelige udgivelse (921.000) og genindtaleles for season finale (84.000).