Hilary Duff is on a roll. After releasing two singles, two music videos, and filming scenes for her acting gig on TV Land’s new show Younger, Hilary is back with her Tove Lo co-written third single titled Sparks. The track marks a departure from Duff’s guitar-influenced comeback singles and a return to her synth driven sounds reminiscent of the Dignity era. In the tune, Hilary catchily coos about how her lover makes her heart whistle over a thumping beat. Listen to addictive offering in full below and purchase Sparks on iTunes.