Justin Bieber has been flirting with model Yovanna Ventura on Instagram.

The 20-year-old star is rumoured to be dating the 18-year-old beauty and despite her referring to him as her ''amigo'', which means friend in Spanish, he appears to have been flirting with her on the picture sharing site.

Yovanna posted an image of herself trying on a figure hugging black dress for her high school prom and Justin later copied the image onto his own account adding the caption: ''I see you in that Dolce Dress. Glad u had fun. :) (sic).''

When the 'Boyfriend' hitmakers' rumoured love interest spotted her picture on his account she decided to return the compliment by posting a shot of him in a smart tailored suit at the Cannes film festival in France last week stating that he was her crush of the day.

She wrote: ''#mcm [man crush Monday] looking great in that suit (sic).''

Although Justin - who split from his on-again-off-again girlfriend Selena Gomez earlier this year - didn't accompany Yovanna to her senior high school prom in Miami, the pair were reportedly seen ''acting like a couple'' after attending the boxer Floyd Mayweather's fight in Las Vegas earlier this month.

The brunette model posted a picture of herself and her rumoured love interest on Instagram following the event with the caption: ''#lp #mayweather w' mi amigo @justinbieber (sic).''