Jessie J in charity head-shave pledge

Jessie J will shave her head for Comic Relief.

The 'Domino' singer is going to go bald for Red Nose Day - the biennial BBC comedy telethon founded by Richard Curtis and Lenny Henry - and made the official announcement on her twitter page this afternoon after telling fans last year that she would crop her hair for charity.

Writing to fans on the social networking site, she said: "I am SO excited and honoured to be able to finally officially announce I will be shaving my head LIVE for you ALL to watch in March 2013 for @rednoseday."

Famed for her hit 'Price Tag', the star joked that "it is all about the money" - at least this time.

Explaining that she has been waiting for the perfect time and charity, Jessie J urged her fans to get involved in the charity.

She tweeted: "I have spent a long time making sure that when I do shave my head I raise as much money as possible for charity."

Red Nose Day first aired in February 1988, and in 2011 the charity raised £74,360,207 (€92,882,900).

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