Jessie J has revealed a new hair colour as she enjoys her 25th birthday.

The British singer is celebrating her birthday today (March 27) and it appears that she has headed to mainland Europe for a getaway.

However, she surprised her online followers by revealing a blonde look only weeks after she shaved her head for charity.

Jessie J uploaded a picture of herself with the striking hair colour on Instagram as followers praised the new look, with one user typing:

"Happy birthday u look gawjas xxxxxxxxx."

The singer also uploaded a photo of herself with friends as she enjoys a spring holiday.

Watch Jessie J shave her head for charity below: