Demi Lovato has had a phenomenal start to 2013. Spurred by first-week sales of 215,000, “Heart Attack,” the first single off her upcoming fourth album Demi, debuted at #1 on the iTunes’ chart in over 25 countries (including the U.S.) and #12 on the Billboard Hot 100. The single achieved Platinum status in the U.S. and Canada within weeks of its release. “Heart Attack” became the most added song on Top 40 Radio in the U.S. the week it premiered, and just hit #6 at Top 40 Radio with over 67 million in audience. The song was produced by The Suspex and co-written by Lovato.