US singer Ariana Grande has made British chart history by becoming the first number one single based on sales and streaming.
The 21-year-old's hit Problem featuring rapper Iggy Azalea was streamed 712,000 times. Grande also pulled in 106,000 sales, the Official Charts Company said.
It is the first time songs played on streaming services like Spotify, Deezer, Napster, O2 Tracks, Xbox Music and Sony's Music Unlimited have counted towards the chart rankings alongside physical and digital sales, the Official Charts Company said.
Of her debut number one, Grande said: "I'm so happy. Yay."
Scottish rockers Biffy Clyro said they are celebrating a "huge honour" after scoring their first number one album.
The release of Opposites attracted 71,500 sales this week, making it the biggest opening week tally for an album this year to date, the Official Charts Company said.
Biffy's success meant The Motion Picture Cast Recording of Les Miserables dropped to number two, while Fleetwood Mac's classic Rumours stood third, 35 years after its first release.