Is SuperBass Nicki best selling song?

Yes, "Super Bass" is Nicki Minaj's best-selling song. The song was released in April 2011 as the third single from her debut studio album, Pink Friday (2010). It became a major commercial success, topping the charts in several countries, including the United States, Canada, and the United Kingdom. In the United States, "Super Bass" spent seven consecutive weeks at number one on the Billboard Hot 100 chart, becoming Minaj's first Hot 100 number-one single. The song has been certified seven-times platinum by the Recording Industry Association of America (RIAA), making it Minaj's highest-certified single in the United States. Worldwide, "Super Bass" has sold over 18 million digital copies, making it one of the best-selling digital singles of all time.