Things may be a little awkward between Selena Gomez and the Jenner sisters, but Kylie and Kendall seem to be getting along just fine with her ex.

A week after being spotted getting dinner with Kendall in NYC, Justin Bieber posted an Instagram photo with Kylie (as well as 18-year-old model Yovanna Ventura) at the Floyd Mayweather fight on Sunday night.

We're not jumping to any conclusions on whether Kylie and Bieber are more than friends, but what makes the whole thing a little strange is the fact that Selena just recently unfollowed both Kylie and Kendall on Instagram -- and deleted photos they had taken together at Coachella.

And again, we're not jumping to any conclusions, but shortly after he shared the selfie, Selena waxed emotional by posting stills from John Legend's "Ordinary People" video. (Back in March, Bieber and Selena got rather friendly dancing to Legend's song in an Instagram video.) Then again, Selena might not have even seen Bieber's photo -- considering she follows literally no one on Instagram.