 Upon its release, "Problem" reached the top position on the iTunes singles chart in over 40 countries and the top ten in over 60 countries, including the United States, where it reached the summit in 37 minutes, hence breaking the previous record held by Taylor Swift, whose single, "We Are Never Ever Getting Back Together" (2012), reached the top spot on the iTunes singles chart with a record of 37 minutes, making "Problem" the fastest selling single in digital history.On April 29, 2014, "Billboard" reported that "Problem" would most likely sell more than 300,000 copies by the end of its first week of availability in the United States, as well as that the song could easily debut within the top 10 of the "Billboard" Hot 100 chart regardless of any added airplay or streaming points.In addition to its sales, which accounted for the majority of its debut chart points on the Hot 100, "Problem" began receiving early radio support.