01/16/2014 10:08 EST | Updated 01/25/2014 04:01 EST

Demi Lovato Shows Off Her 'Healthy' Body In Sexy Bikini Instagram Photo

Could Demi Lovato be the next Paulina Gretzky?

The former "X Factor" mentor tweeted a sexy selfie on Wednesday which showed her rocking a teeny tiny black bikini while lounging on a beautiful beach.

Besides getting an eyeful of her svelte frame, we also got a glimpse of the 21-year-old singer's tattoos on her arm and wrist, her trendy nude-coloured sunnies and her blond highlighted hair.

The "Heart Attack" songstress has come a long way since finishing treatment for anorexia, bulimia and cutting in 2011; not only is her memoir about her struggles being released in 2014 but her Neon Lights Tour kicks off in Canada in February.

We're glad to see that Demi is feeling happy and healthy in the new year!

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