Wikipedia says this:
"Want U Back" will be released as the third official single from the album. The single version features X Factor USA rapper Astro. It is set for a release date of 12 February 2012. Parris directed the video. "Superhero" has been confirmed as the fourth single from the album and will be released on 28 May 2012.
And in the part Music Videos, Superhero is under Want U Back for a long time, nobody has changed it, and the page was edited many times...