BBC Radio 1 part of a Guinness World Record attempt, in aid of Comic Relief. The pair stayed on air for 52 hours in total setting a new world record for 'Radio DJ Endurance Marathon (Team)’ after already breaking Simon Mayo's 12-year record for Radio 1's Longest Show of 37 hours which he set in 1999, also for Comic Relief. The presenters started on 16 March 2011 and came off air at 10:30am on 18 March 2011. During this Fearne Cotton made a bet with DJ Chris Moyles that if they raise over £2,000,000 she will appear on the show in a swimsuit.
The Radio 1 Breakfast Show Radio 1, where celebrity guests choose to either prank call a contact on their phone or delete their number altogether. Other segments include "The Nixtape" – which sees Grimshaw select 30 minutes of party-oriented music before a DJ comes in to mix listener requests to close the week, "Happy Monday", a half-hour of uplifting songs on Monday mornings, "Showquizness", an irreverent daily quiz based around pop culture, "Happy Hardcore FM", which sees listeners phone into the show to scream over happy hardcore beats, and the daily "Waking Up Song", which features celebrities encouraging listeners to get out of bed to