Zane Lowe is to present the Radio 1 breakfast show, but only for a week as part of a 'specialist takeover' at the station in January.
Annie Mac, Huw Stephens and Nick Grimshaw will also be on daytimes from 3 January as part of a drive throughout the month to promote new music.
During the week, the winner of the BBC Sound of 2011 poll will be announced. Compiled from the views of music critics and industry experts, the survey names the rising stars tipped for big things in the coming 12 months. Ellie Goulding was the winner of the BBC Sound of 2010 with previous winners including Little Boots, Adele, Mika, Corinne Bailey Rae, The Bravery, Keane and 50 Cent.
In the first week back in the new year, Annie Mac will host Fearne Cotton's show (10am-12.45pm), Huw Stephens will sit in for Greg James (1-4pm) and Nick Grimshaw will replace Scott Mills (4-5.45pm and 6-7pm).
Deputy Controller of BBC Radio 1 and BBC Radio 1Xtra Ben Cooper said: "Supporting new music is extremely important to Radio 1. Over the last 12 months we have played a major part in breaking artists like The XX, Mumford & Sons, Plan B, Biffy Clyro and Marina & The Diamonds plus many more and 2011 will be no different."
He added: "January will be exciting for Radio 1 as we turn the schedule on its head to bring our audiences even more brand new music and live events all month long."
The station has a special week of BBC Introducing planned for 10-14 January, followed by In New Music We Trust (17-21 Jan) and In New DJs We Trust (24-28 Jan).