Avicii, Little Mix and Sam Feldt try to knock David Zowie from the top spot.
Greg James counts down to the UK's new official Number 1.
Clara presents the last Official Chart on a Sunday before it heads to Friday afternoons.
Dev sits in for Clara Amfo to count down the Top 40 and reveal the UK's new Number 1.
Clara Amfo counts down the Top 40 and reveals the UK's new official Number 1.
Zedd, Walk the Moon and Rixton all try to knock Jason Derulo from the top spot!
Clara Amfo finds out if Jason Derulo can make it two weeks at the top.
Clara hears from Jason Derulo and reveals how his bid for the top spot has gone!
Clara chats to LunchMoney Lewis as he bids for the top spot.
Dev sits in for Clara Amfo and hears from Carly Rae Jepson on the way to the new No 1!
Lethal Bizzle joins Clara as she counts down the Top 40 and reveals the new Number 1.
Scott Mills sits in for Clara Amfo to count down the Top 40 and reveal the UK Number 1.
Can Ed Sheeran knock Jess Glynne off the top? Ed chats to Clara as Scott counts down...
Clara chats to Jess Glynne and also catches up with Sigma and Labrinth.
Sam Smith & John Legend make it another another week at number 1.
Clara lets Sam Smith know he's the new number 1 on the Official Chart.
Scott Mills sits in for Clara Amfo to count down the UK's new official Top 40.
Clara chats to David Guetta, Kelly Clarkson and Sam Smith and reveals the UK's new #1.
Greg James counts down the Top 40 and reveals the UK's new official Number 1.
Clara hangs out with Charli XCX and Mark Ronson and hears from Imagine Dragons.
Clara chats to Ellie Goulding as she waits to find out where she landed in the new chart.
Karen Harding joins Clara in the studio plus she catches up with Chris Lorenzo and Fergie
Clara Amfo takes over, reveals her first No 1 and chats to Meghan Trainor!
Jameela passes the baton to Clara Amfo who will be presenting The Chart from next week!
Kaleem Taylor joins Jameela to find out where his track with Tchami 'Promesses' lands.
Newcomer producer Philip George is in to find out where 'Wish You Were Mine' lands.
Jameela counts down the Top 40 and reveals the UK's new official No 1.
Jameela counts down the new Top 40 and reveals the UK's Christmas Number 1 for 2014!