"Uptown Funk" is a song recorded by English producer Mark Ronson, with guest vocals by American recording artist Bruno Mars, for Ronson's fourth studio album, Uptown Special (2015). Sony Music Entertainment released the song as the album's lead single on 10 November 2014. Jeff Bhasker assisted the artists in co-writing and co-producing the track, with additional writing from Philip Lawrence. This is Mars' fourth collaboration with Ronson (following Mars' own songs "Locked Out of Heaven", "Moonshine", and "Gorilla") and sixth with Bhasker (after "Talking to the Moon", "Young Girls" and the three previously mentioned songs). The single was a commercial success, spending thirteen weeks at number one on the US Billboard Hot 100, seven weeks at number one on the UK Singles Chart, and topped the charts in several other countries including Australia, Canada, France, Ireland and New Zealand. In the week of 25 January 2015, the song was streamed a record 2.34 million times in a single week in the UK: a record since surpassed by Ellie Goulding's "Love Me like You Do" (streamed 2.58 million times). The latter song also beat "Uptown Funk" for the highest number of streams in one week worldwide, with 15.5 million times over 15 million times. "Uptown Funk" also set a new record for the highest number of streams in one week in the US, with 4.8 million streams. In 2015, "Uptown Funk" won Ronson the Brit Award for British Single of the Year.