Corden, who is hosting the ceremony for the second year running, told Xfm that the Britpop band will perform longer than any previous 'Outstanding Contribution' winner.
The Gavin & Stacey star said: "Blur will perform for 11 minutes at the end of the show - more than anyone has been given before for the 'Outstanding Contribution To Music Award'."
Damon Albarn and Graham Coxon unveiled brand new song 'Under The Westway' at a pre-Brit Awards gig at O2 Shepherd's Bush Empire last night.
Last week, Coxon revealed that Blur will "definitely" release a new album in the future.
The Brit Awards 2012 will take place at London's O2 Arena tomorrow (February 21). The show will be broadcast live from 8pm on ITV1.
> Bassist Alex James: 'Blur back together is like The A Team back for one last job'
Watch Blur perform 'Under the Westway' below: