we get back together", said Emma Bunton, while Melanie Chisholm commented that the tour "will be a proper good farewell to our fans". Initially, singer George Michael agreed to write a comeback song for them, but took longer than expected, prompting Halliwell and Bunton to write another one instead. The group's comeback single, "Headlines (Friendship Never Ends)", was announced as the official Children in Need charity single for 2007, and released on radio on 23 October, whilst released digitally on 5 November and commercially on 19 November 2007. Geri Halliwell described the single as a "big love song" and "a Spice Girl classic". Chisholm, in her 2008 appearance on Never Mind the Buzzcocks, commented that she thought the song was not good at all, and that at least she was against the release of any new material when the record company was trying to market the Greatest Hits release. She would later say, "'Headlines' grew on me, it really came in to its own when we toured it, and it really felt lovely on stage". Composition "Headlines (Friendship Never Ends)" was written by the Spice Girls, along with Richard Stannard and Matt Rowe, who also produced the song. Musically, "Headlines (Friendship Never Ends)" is a midtempo pop ballad. It is written in the key of D-flat Major, and moves at a slow tempo of 76 beats per minute. Lyrically, it talks about the group reuniting, mainly discussing their friendship throughout two decades together. They sing: "Let's make the headlines/loud and true/I wanna tell the world I'm giving it all to you/Let's make the headlines/loud and clear/the best things only happen when you are near". The song is built around an acoustic guitar, syncopated rhythms, and lilting croon-styled vocals. The subtitle references a line from their breakthrough hit, "Wannabe". According to Spence D. from IGN, the song "pretty much fits the mold of the Girls previous outings of this down tempo variety", like "2 Become 1" and "Viva Forever". He commented, "if it hadn't been singled out as a new track you'd easily swear that it was a "lost" B-side from one of their previous albums". For Nick Levine from Digital Spy, "The Spice Girls' comeback single is as hip and modern as Jeremy Clarkson's dress sense: the simple drum loop could have been laid down while they were recording their debut album; the flamenco guitar riffs are pure 'Viva Forever';