Just Dance was musical piece that garnered success incrementally.
In the United States , `` Just Dance '' was a sleeper hit , spending almost five months on the Billboard Hot 100 before finally reaching the summit of the chart in January 2009 , after being released in April 2008.
In the entertainment industry , a sleeper hit is a title -LRB- such as a film , song or game -RRB- that becomes successful gradually , often with little promotion.
