The song was first announced as the album's third single when it was revealed that the band would perform the song live on the Comic Relief telethon on Red Nose Day 2011 – Friday 18 March. The group performed the song at 9:15pm, following which an announcement was made that a video for the track would premiere on the same night at 10:30pm. The video premiered on digital music channels on 6 April 2011, which subsequently was the same date that the track was placed on the BBC Radio 1 B-Playlist, on 6 April 2011. In the United Kingdom, the single was only released digitally, though a promotional physical release of the single, complete with remixes from Paul Oakenfold and Benny Benassi, was made available in Europe.
Music video
The official music video for "Happy Now" was recorded at the BBC Television Studios during February 2011. The video premiered on the Red Nose Day 2011 telethon on 18 March and Take That also performed the number live. The video begins with the band sitting as a Judges' panel in a small room. The band bring on participants who are hoping to be formed into the group's ultimate tribute act, Fake That. Many bands appear on stage, including a group of youths, a mixed gender group and five OAPs. The band are then introduced to a five piece made up of comedians Alan Carr, James Corden, John Bishop, David Walliams and Catherine Tate, impersonating Owen, Barlow, Williams, Donald and Orange respectively. The five comedians appear on stage in the group's outfits from their "Do What U Like" video in 1991. The real Take That heckle them off stage, however, they return disguised as the group from their video for "The Flood", complete with the Progress rowing boat. In similar fashion, they are heckled off; however return in outfits from the group's videos for "Pray" and "Back For Good" with each impersonator performing the dance moves of the member of Take That they are pretending to be. Gary Barlow and the rest of the band then agree that the group look good in their "Back For Good" outfits, and decide to make them into Fake That. The real Take That then appear on stage and perform the final piece of the track with them, before leaving what seems to be a television set. In the end, Carr says "Bye, thanks for coming" to them.