After ringing in 2016 with a performance on Pitbull's "New Year's Revolution" on Dec. 31, 2015, pop stars Camila Cabello and Shawn Mendes shared Instagram photos that could indicate they were spending time together, fueling relationship rumors.

Cabello and Mendes both posted photos while enjoying the warm Miami weather on New Year's day. The images added to the ongoing speculation that the Fifth Harmony member and the Canadian pop singer are an item but are keeping their relationship under wraps.

On his Instagram account, Mendes shared a photo and video of his lower legs and feet as he rested poolside. While there was nothing suspicious about his post alone, Cabello posted another that got fans talking.

A video posted by Shawn Mendes (@shawnmendes) on Jan 2, 2016 at 2:35pm PST

Cabello shared two photos of herself in a black bikini on the beach, captioning the second one, "If Miami were a person they would be the only person I ever hung out with."

The photos caused some fans to speculate the two were actually posting images from the same location.

While Mendes can be seen resting poolside and Cabello is seen on the beach, it is clear in Mendes' photos that the beach is right near the pool.

The teens posted the photos on the same day, only an hour apart from one another.

During an interview with Teen Vogue, Cabello admitted she had dated in secret before. She also revealed she would keep quiet about future relationships until she was ready to go public, leading fans to believe she is currently doing that with Mendes.

"If there were to be tweets or pictures of us, it would be because I was with that person for a while and the relationship was really special and strong enough," she said. 

The two stars will be the musical guests on the Monday, Jan. 4, episode of "The Tonight Show Starring Jimmy Fallon."

Both Mendes and Cabello shared the announcement of the performance, with Cabello captioning her post, "gonna pee myself at @fallontonight when @shawnmendes and i perform tomorrow. just wanted to warn you all. (PS, i love you @jimmyfallon)."