Heap's first album, iMegaphone, was released in 1998. Heap then joined forces with Guy Sigsworth and in 2002 released the album Details under the name Frou Frou. In 2005, Heap released her second studio album, Speak for Yourself. One of the album's singles, "Hide and Seek", went on to be certified Gold by the RIAA. In 2009, Heap released her third studio album, Ellipse, which went on to reach number one on Billboard's Electronic Albums. In 2011, Heap began work on her fourth album, Sparks, which was released on August 18, 2014, and became her second number-one album on Billboard's Electronic Albums chart.
^"Hide and Seek" was certified Gold by the RIAA on 3 April 2009.[17]
^"Hide and Seek" did not chart on the Billboard Canadian Hot 100 chart but peaked at number 57 on the Billboard Hot Canadian Digital Song Sales chart, a component of the main Hot 100.
^"Hide and Seek" did not chart on the Billboard Hot 100 chart but peaked at number 6 on the BillboardDigital Song Sales chart, a component of the main Hot 100
^"Not Now But Soon" was later added to the Japanese version of Ellipse.
^"First Train Home" did not chart on the Billboard Hot 100 chart but peaked at number 6 on the BillboardBubbling Under Hot 100 extension chart.