The song was recorded by Simons and producer Tearce "Kizzo" Keaz in August 2008. In April 2009 the electropop track "Silly Boy" was leaked onto YouTube. Simons said in an interview that at the time of the leak she was devastated, but later became thankful for its helping the track gain exposure. However, in an earlier interview she said, "At first I was happy because it was cool to hear my song on the internet," but then she considered the difficulties of getting credit for it.
In a press release, EMI's Billy Mann said: "Eva has taken the internet by storm and she already has a huge fan base that's just waiting for more. 'Silly Boy' captures her fabulous energy and strength of personality."
Nick Levine of media website Digital Spy gave the single a positive review and 5/5 stars stating: "Thankfully, the track itself is worth every little scrap of fuss. With its zapping synths, rock guitars, booming beats, spiky lyrics and planet-sized chorus, it's a whopper of a song - pop on steroids. As for Simons, her ballsy attitude matches the bombastic production and the hairdo she rocks in the video makes Elly Jackson look like a chicken with the styling wax. The result? The most striking pop debut since 'Just Dance'."
Paul Lester of The Guardian stated that he thought the song was not up to much, but the producer deserves a medal, and also compared the song to Lady Gaga's single "Poker Face".
"Silly Boy" is being released as a single. "Silly Boy" will be released to a total of twenty EMI territories through EMI Music Germany, beginning on September 4, 2009, in Germany and on October 12, 2009, in the United Kingdom through Virgin Records. The song is now available on iTunes in Australia, North America, and Europe.
The music video, directed by Micky Suelzer and Daniel Warwick, premiered on July 30, 2009, on both Simons' website and YouTube. The video shows Simons styling a large hairdo and a wearing a silver sparkly outfit during dance scenes, an outfit covered with plastic straws and a black jumpsuit during car scenes. Throughout the video, Simons is shown dancing with a team of backup dancers on the chorus of the song, and in a corridor singing with letters spelling her name in the verses. Also, Simons is shown in a car, which she later gets out of, slams the door of, and gets back into. The video features a very Disturbia-esque dance routine and Eva wears disco ball-themed clothing.