[1] "Sing It" received mixed to positive reviews from music critics, surprising some due to the song not being modified with the pitch correcting software Auto-Tune that was used in Black's previous singles.

On May 8, 2012, the accompanying music video was uploaded on Black's YouTube channel, with release of the single digitally at iTunes Store.

Jamie Peck of Crushable said that the song was a "decent approximation of teen pop music", but that it would never reach the levels of Kelly Clarkson.

"[6] Hollywood Life called the song "simple, but cute", noting that it was "perfect for Rebecca’s age demographic.

"[7] Dusten Carlson of The Inquisitr described the song as having a "slightly more mature and less-nasally sounding Black" and that "Unless it’s been seriously tampered with by a producer, the girl proves she’s got some pipes, at least ones that’ll satisfy the pop-niche she’s going for.

Black ultimately ushers in the warm weather season with the sound of her frothy, light, sand-between-your toes jam, too".