"Mousetrap Heart" is the first single from Thirsty Merc's third album Mousetrap Heart. It was released as a digital download on 21 May 2010. The track has received positive reviews from fans and critics alike with most praising the band's polished new sound, owed in part to U.S. album producer, Matt Wallace (Maroon 5). Mousetrap Heart received heavy airplay in Australia soon after its release to radio in May 2010 The female singer featured in Mousetrap Heart is Carmen Smith