Justin Bieber & Rihanna Instagram Flirt, Chris Brown Jelaous Diss? Selena Gomez's Ex Single, Shares Sexy 'Happy Holidays' Bra PHOTO Amid Hailey Baldwin Dating Buzz

Despite rumors that Justin Bieber is currently dating aspiring model Hailey Baldwin, the "Believe" crooner recently confirmed his single-status on Instagram:

justinbieber: "People are crazy. I'm super single and this is my good friend u would know otherwise."

Well, that settles that! Perhaps the 20-year-old pop sensation still has feelings for on-and-off again ex-girlfriend, Selena Gomez?

Or... maybe he has a "thing" for 26-year-old #BadGirl, Rihanna!

UPDATE: Rihanna Disses Justin Bieber After Instagram Holiday Flirt? Selena Gomez's Ex 'Too Cute,' Can't Handle Dating Chris Brown & Drake's Wild Ride! Twitter Fans Agree?

On Tuesday (December 16), the Biebs shared this rather bizarre "Holiday Greetings" message on Instagram:

Huh?

The sexy bra snapshot was later deleted once fans started to take notice...

Okay, we get it - RiRi's gorgeous! But amid all of the dating drama, why would Bieber share this specific picture? He just hung-out with Chris Brown, and the 25-year-old hip-hop superstar obviously has some major history with the "Stay" beauty...

Do MstarsNews readers agree that the two would make a rather odd couple, anyway...

Maybe nothing says "Happy Holidays" than a topless, Barbadian sweetheart flaunting a slinky lace bra!

Bieber later raised eyebrows again after sharing this image:

justinbieber: "@kendalljenner why the need for two guns fool and @haileybaldwin good work today we were killin everyone. #nerfwars."

Yup - Kendall Jenner's involved, too!

The Biebs is still young and likely enjoying his young Hollywood "Playboy" status, but wonder if the R8 songstress took any notice? She remains mum on Instagram.