was described as "deliciously slutty" and includes rapping similar to Betty Boo and Neneh Cherry. The song's outro was compared to The Black Eyed Peas' "My Humps". It was described by The Observer as "Eighties Boney M funk-pop." "Waiting" was described as a highlight by The Sunday Times. "Whole Lotta History" was called a "lush ballad", and it received comparisons to the Spice Girls' ballads. "Whole Lotta History" has also received comparisons to All Saints' "Never Ever". "Long Hot Summer" was called "effervescent but relatively unexciting", as well as a "well-produced, upbeat pop tune, with a great hook in the chorus" by The Sentinel. The song, like "Watch Me Go", also includes Betty Boo-esque rapping. "Swinging London Town" received critical praise. It was called "a dark, squiggly synth pop epic a la Pet Shop Boys on the diverse characters – from wannabes to trustafarians – found in the nation's capital", and that there "hasn't been a song since the Pet Shop Boys' 'West End Girls' that captures the ugly charms of London on a Friday night, but 'Swinging London Town' comes close." It was further described as "a collision of warp-speed funk guitar riffs and distorted Giorgio Moroder-style techno-disco that unexpectedly drops into wafting movie-soundtrack ambience." "It's Magic", a Nicola Roberts solo which was called "the album's hidden highlight", was labelled "weighty, sultry electro-pop [...] layered with beautifully enticing synth melodies." "No Regrets", sung solely by Nadine Coyle, is an electro-bossanova ballad. The album's closer, "Racy Lacey", is "a portrait song of a young lady in the style of Prince's "Darling Nikki" or Blur's "Tracy Jacks." The Guardian called it "a kind of nuclear-powered Euro novelty record." Release Chemistry was released in Ireland on 2 December 2005 and in the United Kingdom on the following Monday. In addition to the standard edition of the album, a limited edition with a bonus disc was also released. The bonus disc contains Christmas music, including covers and original songs produced by Xenomania under the moniker Randy Snaps. The songwriters also took on Christmas-related pseudonyms. In Australia and New Zealand, the album was released on 20 February 2006; however, it failed to generate much interest. Additionally, Chemistry and other Girls Aloud releases appeared on the US iTunes Store on 26 June 2007. Singles The album's first single was "Long Hot Summer", released in August 2005 as a "buzz" track to regenerate interest in the