Wow is the first track on Prince's 36th album Plectrumelectrum (the first by Prince and 3rdEyeGirl. The track was first released seven months earlier, however, as The Unexpected, the second track (first song) on Liv Warfield's second album, The Unexpected.
Basic tracking dates are not known, but the track is believed to have been recorded in 2013, most likely at Paisley Park Studios in Chanhassen, Minnesota. According to an interview Liv Warfield gave to Oregon Live, Prince wrote the song for Warfield after she had decided on the album's title; she did not have a title track for the album until that point. The lyrics of the song point to the track's two titles, stating "u can call it the unexpected or u can call it... wow!" Although Liv Warfield's version could be considered a cover version (since it does not include Prince as a musician), it was released before Prince's own, so it is included here.
While the Prince and 3rdEyeGirl version of the track shares a title with the unreleased 1992 track Wow, the tracks are otherwise unrelated.