The song was written by Louis Biancaniello, Kahmarl Gordon, Sam Watters, James Bourne and produced by the Runaways.

[1] "Forever Is Over" was originally written for former American Idol winner Kelly Clarkson by former Busted and Son of Dork star James Bourne and production group, the Runaways, who is well known for their writing for the likes of Jordin Sparks' single "Battlefield" and other songs for Natasha Bedingfield, Beyoncé, Alexandra Burke and Leona Lewis.

[3] The single was accompanied by a B-side entitled "I Can't Wait" which was co-written by the Saturdays together with Hannah Robinson and producers Ben Macklin, Julian Peake and Richard Stannard.

"[5] Nick Levine from Digital Spy said "'Forever Is Over' finds them shifting away from glossy electropop and taking a few stiletto steps into pop rock territory," and further describing the song as having a "Big, beltalong chorus that hits its target, and that Una Healy shines on the guitary middle 8.

"[6] The BBC Chart Blog elaborated on the single as being in the "Highest realms of the UK pop league up there with the Pixie Lotts and Girls Alouds of the world," further describing it as sounding "Slick" and "Big" with a "Mahoosive, dancealong, brilliant chorus.

"[7] Musosguide reviewed "Forever Is Over" as a "Deliciously catchy tune that marks a welcome return to the electric guitar to a pop market that is saturated beyond recognition with electro-sounds.

Music's view of track included it having "Sultry verses and a full throttle chorus which suggests a new, more sophisticated direction to put them on par with their rivals.

The first bridge is shared by Rochelle Wiseman and Mollie King, while the chorus is sung by Vanessa White.

The single was also performed at various British music festivals and on various television shows as promotion during its release period.

On 12 September, "Forever Is Over" was played live for the first time at the Annual Freedom Festival held in Hull.

[14] Later that month, on 28 September, the group was interviewed on The Paul O'Grady Show where they performed "Forever Is Over" for the first time on live television.

[17] On 29 November the girls performed "Forever Is Over" on T4's Stars of 2009 alongside British hip hop trio N-Dubz at Earl's Court in London.

As the chorus kicks in, White is seen walking out of the house, slamming the door, singing the lyrics, "forever is over", which means she's left her boyfriend, she has had enough.

Sandford sported a wig in the music video, as her hair at time of recording and release was cut in an asymmetric crop, which later became one of her signature looks.