Internet users hoping to access the page for Chris Moyles's Radio 1 show were confronted with an internal error message because the page was "experiencing abnormal traffic".
Listeners and those viewing the live video stream were promised that Cotton would strip to a swimsuit between 10.10am and 10.30am should Moyles's fundraising efforts have exceeded £2 million.
"Ok. Due to high volumes of traffic (we wonder why), the website has crashed. Red Button still running! (sic)" the station's Twitter feed read.
"The latest total is an amazing £2,406,648 and @fearnecotton is in the studio in her swimsuit for the next 10 minutes."
As the station ended its 'Radio 1 More Moyles' fundraiser, it added: "From Chris, Dave, the team and everyone at @BBCR1, we thank you for joining and supporting us over an amazing 52 hrs."
Earlier this morning, Moyles and Dave Vitty broke the world record for 'Radio DJ Endurance Marathon (Team)'.
> See Fearne Cotton in a swimsuit!