Pharrell Williams’ Happy Enters 4th Week At No.1

The Happy train just keeps on rolling for Pharrell Williams, whose single continues to grow in its fourth week atop the Billboard Hot 100.

Featured on his album, "G I R L," "Happy" earned its fourth week at the summit Wednesday, seeing a 12 percent surge in audience impressions at radio.

"Happy" continues its Hot 100 command, claiming top Airplay Gainer honors for an eighth consecutive week. The streak is the second-best dating to the award's 1985 inception, with Williams also on-board the record-holder: Robin Thicke's "Blurred Lines," featuring Williams and T.I., linked a 10 weeks (in a row and total) last year. "Happy" tops the Radio Songs chart for a third week with a 12 percent surge to 210 million all-format audience impressions, according to Nielsen BDS. In the Radio Songs chart's 23-year history, only two other titles have cracked the 200-million audience barrier: "Lines," which logged a record 229 million on the July 20, 2013, tally, and Mariah Carey's "We Belong Together," which peaked with 212 million (May 28, 2005)," reports Billboard.

"Happy" continues its ride atop the Digital Songs chart for a fifth week. It is also no.2 on the Streaming Songs chart.

Over on the R&B charts, "Happy" has earned a sixth week on the Hot R&B/Hip Hop Songs chart. It's also no.1 on the R&B/Hip Hop Airplay, R&B/Hip Hop Digital Songs, Rhythmic and Hot R&B Songs charts.