 The song received positive reviews from music critics, who complimented its club, anthem-like nature and the synth-pop associated with it.The song reached number one in the United States, Australia, Canada, Ireland, the Netherlands and the United Kingdom, as well as the top five in the Czech Republic, Hungary, New Zealand, Norway, Scotland, Spain, and Sweden.In the United States, "Just Dance" was a sleeper hit, spending almost five months on the "Billboard" Hot 100 before finally reaching the chart's summit in January 2009.