"Relax, Take It Easy" is the debut single by British singer-songwriter Mika, from his debut album Life in Cartoon Motion. In the UK, it failed to chart upon its original release, but after "Grace Kelly" topped the charts in January 2007, it managed to peak at #67 on the UK Downloads Chart because of download sales. The song makes use of a melody line from the Cutting Crew hit single "(I Just) Died in Your Arms".
The song debuted at #12 in the week ending 30 June 2007 in the Billboard European Hot 100, jumping to #8 the following week, to #4 in its third week and to #2 in its fourth week, despite not being released in some European countries such as the United Kingdom. In Spain, the song received double platinum certification for more than 40,000 downloads. The song peaked at #4 in the Spanish download chart. The song spent 2 weeks at #1 on the Belgian Ultratop Chart, 7 weeks at #1 on the Dutch Top 40 Chart and 15 weeks at #1 on the French Download Chart. The song received gold certification in Russia with 50,000 copies sold.