&Beat of My Heart& is a song recorded by American singer Hilary Duff for her compilation album, Most Wanted (2005). It was written by Duff and the Dead Executives, who also produced the song. Along with the three other new songs on Most Wanted, &Beat of My Heart& was crafted with the intention of having a &totally different sound& from Duff's previous material. Although she thought of the work to be a new milestone in her career, she was at the same time nervous about her fans would react to the material. Following the success of &Wake Up&, &Beat of My Heart& was issued as the second international single from Most Wanted. It was released in Australia by Festival Mushroom Records on December 11, 2005 and throughout Europe in the spring of 2006 by EMI Records.
&Beat of My Heart& is an up-tempo New Wave-inspired electropop song that incorporates elements of bubblegum pop and dance music in its production. Lyrically, the song can be interpreted in many different ways. For Duff, it tells the story of a woman &com[ing] out of her shell again& after a bad break-up. &Beat of My Heart& received generally mixed reviews from contemporary music critics, with many criticizing the song for being repetitive and childish, while others gave it credit for presenting an easy-to-listen-to sound.
&Beat of My Heart& was a moderate commercial success. The single managed to chart in four different countries, reaching its highest position in Italy, where it peaked at number eight. In addition, it reached the top twenty in Australia and Spain and the low-end of the chart in Switzerland. The music video for the song was directed by Phil Harder. The video, which paid homage to bond girls, debuted a &more mature& image of Duff. It emulates the title sequences of James Bond films from the &silhouetted 1960s& to present-day, high-tech 3D designs. Duff has performed &Beat of My Heart& live on all of her concert tours since its inception.