Shawn Mendes
Shawn Mendes is pictured on Nov. 10, 2018 in Cannes, Frances. Valery Hache/AFP/Getty Images

Shawn Mendes and Camila Cabello are no strangers to rumors that they are dating but they've also done nothing to make fans think otherwise. The "friends" continue to spark relationship rumors, most recently on Sunday after being spotted out at brunch together. Photographers caught the suspected couple holding hands and looking cozy in West Hollywood, California.

"They couldn't keep their hands off each other," an eyewitness told E! News. "They went to brunch for about an hour and a half then went to a spa in West Hollywood. They both kept playing around, dancing and joking with each other."

Mendes and the Cuban-American singer have been subject to dating gossip ever since the pair got together for their hit 2015 single "I Know What You Did Last Summer." It's been four years since the collaboration but their new single, "Señorita," seems to have only stoked the rumor mill.

After releasing steamy footage of the music video for the new song on social media, fans were both excited for new music and the potential of a Mendes-Cabello relationship. Despite fans desperately wanting an answer, both performers have remained tight-lipped on their status.

During a Q&A after the "Stitches" crooner's concert in Los Angeles on Friday, a curious fan flat out asked, "Are you dating Camila?" Mendes, 20, shook his head and turned his palms face up, seemingly shrugging off the question.

Mendes and the 22-year-old former Fifth Harmony member aren't the only ones that continue to cause speculation. Mendes' mother, Karen Rayment, seemed to give her stamp of approval with a few comments on Instagram last month.

Whether or not Mendes and Cabello are a couple still remains up in the air but you know what they say: Where there's smoke, there's fire.