The R&B track is a collaboration with rapper Big Sean, and it's the third single from Grande's upcoming album, My Everything. According to Us Weekly, the former Nickelodeon star has dubbed the new track "her favorite yet."
Grande, 21, took to Twitter Tuesday to thank fans for getting the single in the top 15 just one day after its release.
woke up to see Best Mistake at no 1 on iTunes! thank y'all so much!! I'm on 4 songs in the top 15. y'all never cease to amaze me. thank u!!!— Ariana Grande (@ArianaGrande) August 12, 2014
"Best Mistake" comes almost one week after the singer teased yet another new track titled "Love Me Harder" on Instagram.
Grande's second album, My Everything, is scheduled for an August 25 release. The record's lead single, "Problem," was launched in April and the second single, "Break Free," was released on July 2.