Justin Bieber & Yovanna Ventura 'Flirt' On Instagram, Selena Gomez Jealous? Model Stuns In Sexy Prom Dress, Singer's Gorgeous Wedding Date? [PHOTOS]

Justin Bieber never officially dated aspiring model Yovanna Ventura, but apparently he can't keep his eyes off of her!

On Monday (May 26), the Biebs shared this viral snapshot of the brunette bombshell on Instagram:

justinbieber: "I see you In that Dolce Dress. Glad u had fun. :)"

How flattering! And yes, Ventura does look absolutely amazing.

In response, the young beauty posted this "Man Crush Monday" photo of the 20-year-old "Believe" crooner:

yoventura: "#mcm looking great in that suit."

According to HollywoodLife.com, Bieber attended the wedding of Adam Braun (brother of manager Scooter Braun) over the weekend. Perhaps Ventura attended as the Biebs' stunning date?

Maybe, maybe not. But turns out Ventura actually flaunted the flattering Dolce Gabbana gown for her prom!

yoventura: "First prom dress of tonight. Dress: @dolcegabbana Make up: @ninasmakeup."

She also made another quick dress change at one point during the evening:

yoventura: "Second prom dress for tonight. Dress: @mtcostello@michaelcostello @tiney_bear1 Make up:@ninasmakeup."

No word on whether or not Bieber showed-up as her prom date.

So - are Bieber and Ventura actually dating? Wonder what ex-girlfriend Selena Gomez thinks about that, or if she even cares!