Grime collective Roll Deep have pipped US star Usher to the top of the UK singles chart with their latest track Good Times.
Usher had to be satisfied with second spot for his former number one single, OMG, featuring Will.I.Am.
In the official albums chart, Usher's latest album - Raymond v Raymond - also had to settle for second place.
Plan B - otherwise known as Ben Drew - reclaimed top spot with his debut, The Defamation of Strickland Banks.
His album debuted at number one two weeks ago but was pushed into second place last week by AC/DC's soundtrack to the film Iron Man 2.
The only other new entry in the singles chart top 10 was Taio Cruz's Dirty Picture, featuring Kesha, at number twelve.
The albums chart has three new entries including Glee Cast, The Music, The Power of Madonna by the cast of TV show Glee, which went straight in at number four.
Fever from Bullet For My Valentine was also a new entry at number five.
Folk group Port Isaac's Fisherman's Friends entered the chart at nine with their album of the same name.
Most of the band's songs are over 200 years old, covering topics such as drinking, sailing, fishing, prostitution and robbery.
Roll Deep's alumni include Dizzee Rascal and Tinchy Stryder.
Its current line-up includes Wiley, Breeze, Scratchy, Flow Dan and Danny Weed.