Pop star Beyonce Knowles has a "mostly plant-based diet" with "some fish here and there", says her personal trainer.

The `Drunk in Love` singer tried out a vegan diet for 22 days with her husband Jay Z in the lead up to Christmas. Since then has since mostly kept to it, according to trainer Marco Borges, reports eonline.com

"She is all about health and wellness. She just wants to feel good. The transition (from vegan) was fairly easy because (now) she's sticking to a mostly plant-based diet with some fish here and there,` said Borges.