"My Delirium" was written by Ladyhawke, alongside Hannah Robinson and Pascal Gabriel, both of whom Ladyhawke worked with on her previous single. Ladyhawke later said she was looking for high-powered producers to collaborate with. Ladyhawke wrote "My Delirium" after suffering a lack of sleep due to jetlag and feeling a sense of homesickness. According to co-writer Robinson, "My Delirium" and "Dusk Till Dawn" were both written on their first and only session together. Ladyhawke, when describing her songwriting process, stated she tries "to keep simple hooky guitar riffs throughout the tracks..." and she "wanted to capture the 'happy sad' vibe that so many eighties classics had."
Critical reception
"My Delirium" received several positive reviews from critics. Nisha Diu of The Sunday Telegraph described "My Delirium" as "...a moody, energetic anthem underscored by insistent drums and a soulful vocal..." Popjustice described the song as "brilliant", and Digital Spyentertainment reporter David Balls labelled the song as a "glorious slice of indie-electronica". In its review, AllMusic said the song "echoes the power pop of The Bangles and The Go-Go's". Frazier McAlpine, on a BBC blog, described "My Delirium" as "a good pop song... grumpily delivered", and called Ladyhawke's voice "sulky".
Music video
The music video for "My Delirium" was directed by Benji Davies and Jim Field, together known as Frater. The video starts with Ladyhawke in a roadside motel looking out the window while packing her bags. The video then transitions into an animated picture on the wall, depicting Ladyhawke leaving the motel and driving along a remote desert road in a Ford Thunderbird. As the video continues, the desert road backdrop becomes more unusual, with landmarks such as Mount Rushmore with the heads of cats being passed by, until the bridge, where the car is seen to drive off a cliff and begins to fly. The video then continues with Ladyhawke playing the guitar in watercolour, and driving through space. The video finishes by fading out of the picture and back into the now-empty motel room. When producing the music video, Frater collaborated with Sarah Larnach, who also drew the album cover for the Ladyhawke album and her singles. Larnach painted nearly all of the background scenes, and the images of Ladyhawke and the car were created using a rotoscope layering technique.
The song was also featured in Forum Snowboarding's 2010 film F*ck It.
Chart performance
"My Delirium" is Ladyhawke's most commercially successful song to date, having charted higher than both "Paris Is Burning" and "Dusk Till Dawn" on the UK, Australian, and New Zealand charts. The song started charting on digital downloads, debuting at number 119 on the UK Singles Chart three weeks before its physical release. The next week it rose 44 places to number 75 with two weeks until its physical release, before continuing to rise to a peak of number 33 on 20 December. In New Zealand, the song debuted at number 30 on 2 February 2009 before peaking at number nine in its seventeenth week on the chart. It was certified Gold on 13 September 2009, selling over 7,500 copies. In Australia, the song peaked at number eight on 1 February after 13 weeks. It has also been certified Platinum, selling over 70,000 copies. In Denmark, the song peaked at number 36, yet failed to beat "Paris is Burning" on the European charts, which had peaked at 33. The release of "My Delirium" followed the release of "Dusk Till Dawn", which only managed to chart in the United Kingdom at a peak of number 78. "Paris is Burning" was the most successful release previously – it had been featured on the TV show Ugly Betty, and peaked at number 40 on the New Zealand charts. Following the release of "My Delirium", "Paris is Burning" was re-released and outperformed its previous chart positions.