Could Ronan Farrow come between Selena Gomez and Justin Bieber?

Selena Gomez and Justin Bieber may have their relationship back on track, but what would it take to derail their love yet again? Could a photo posted on Twitter by Ronan Farrow be enough to end young romance (again)?

Farrow, the 25-year-old son of Woody Allen and Mia Farrow, tweeted the photo of himself and Gomez on Tuesday (Dec. 18). The caption on the playful photo reads as follows:

"Do not challenge the lovely @selenagomez to a dance-off. You will lose."

Does this photo -- taken at a party celebrating Farrow's 25th birthday -- signal the end of Justin Bieber and Selena Gomez? Probably not. The celebrity couple was spotted exiting a plane in Los Angeles the next morning, indicating that the photo was indeed nothing but fun.

Still... Bieber might want to consider feeling threatened by Farrow. The young man works as a human-rights activist, graduated from Yale Law School at age 21 and won a Rhodes scholarship.

At least Justin Bieber still has more Twitter followers.