Sundays 16:00 to 19:00
With Marvin Hume
The Vodafone Big Top 40 Show - "the chart you can change" is officially the UK's No. 1 chart show.
You can change the top while the programme is on air.
The show counts down the biggest hits of the week and you can influence the Top 10 by downloading your favourite tracks from bigtop40.com during the live show.
The programme begins with 10 biggest songs from iTunes over the last week, then we countdown 40-11, a mix of airplay sourced from participating stations and download sales.
The top 10 will be based purely on iTunes data, it will be "locked-down" at 6pm and then played out in full, non-stop.