British pop star LEONA LEWIS has become a vegan.

The Bleeding Love singer has been a vegetarian for many years and has long championed animal rights causes, even refusing to wear leather shoes.

She has now stepped up her fight by giving up animal food products altogether by adopting a vegan diet.

Lewis admits she is trying it for a month to see how she gets on and is asking fans to let her know their favorite vegan recipes.

In a post on Twitter.com, she writes, "I've been vegan for a few days now, I'm trying it for the whole month. Any recipes you can recommend?"