
The hour-long, ad-free programme has been running each Sunday for the past 12 months, and the latest deal secures its place until 2010.
In Magic's Indulgence show, a celebrity is interviewed and plays their favourite songs.
The concept, brokered by Universal McCann and Bauer Advertising, is designed to generate a long-term dialogue with More Th>n customers, while reinforcing the company's "we do more" promise.
Hosted by various Magic presenters, forthcoming guests include Annie Lennox, Lionel Richie and Ronan Keating.
The show will be supported by live music events throughout the year, with artists such as Gabriele and James Blunt.
More Th>n will also provide a Monday morning Indulgence break - a branded sweep of celebrities' favourite tracks to start the working week.
In addition, Magic will feature four tactical More Th>n promotions throughout the year, as well as underpinning all activity with online content at Magic.co.uk.