Justin Bieber & Adriana Lima Steamy Cannes Hook-Up Revealed: Did Selena Gomez's Ex Share Sexy 'One Night Stand' With Older Victoria's Secret Model?

Rumors suggest that Justin Bieber is definitely enjoying the "single life" since officially breaking things off with ex-girlfriend, Selena Gomez. Apparently, the "All That Matters" singer hit-up both Adriana Lima AND Barbara Palvin while partying at the Cannes Film Festival earlier this month. But which Victoria's Secret beauty did he allegedly take home for the night...

Apparently, the 32-year-old Brazilian beauty!

The infamous gossip tabloid Us Weekly reports that 20-year-old Bieber had a "hot-and-steamy" hook-up with the brunette bombshell while in France. Apparently, the much younger pop star "made a beeline" for Lima when both her partying at the popular French Riviera nightclub, Gotha. An alleged insider reveals that "Justin pursued her hard." Both attended a private after-party later that evening, where "they were talking nonstop." The source adds that "they went home together around 5 a.m."

Around that same time, the Biebs posted this flirtatious snapshot on Instagram:

justinbieber: "I think she foreign, I think she foreign."

FYI - Lima has two children with ex-hubby Marko Jaric.

But will a "serious" relationship bloom from the sexy one night stand? Probably not:

"He had fun with Adriana... [But] it won't turn into anything serious."

Do Mstars readers believe the eyebrow-raising hook-up rumors?