Naomi Campbell and Liam Payne seen at the 'Secret Appointment & # 39; at the concert after flirting

Naomi Campbell and Liam Payne fueled rumors that they would be dating after being seen attending a concert together on Sunday.

The model, 48, and the 25-year-old pop star, were filmed leaving the VIP space of the O2 Arena in London following the concert of Nigerian singer Davido.

The beautifulborn Streatham looked casual with a double denim and a large jacket as she walked in the lead with the One Direction singer, wearing a plaid jacket, following.

A source told the Daily Star Online: "Liam and Naomi wanted to be discreet, they came in and out of the arena through the back door and were quickly taken to a VIP suite on level 3.

Naomi was more than happy to pose for official photos inside the venue but she had none with Liam.

"After the show, they went off to the back of a black and black Range Rover, and we saw Liam put his arm around Naomi's waist."

Their apparent date comes after both men have flirted on their respective Instagram accounts in recent weeks.

After a child's father, Liam, shared a sensual, shirtless picture on his page on Jan. 15, Naomi commented, "Beautiful soul," to which Liam replied, "Take someone for to know one. "

The singer could not help commenting on Naomi's selfie before the Louis Vuitton show in Paris on Jan. 18: "Perfection in a person … do not give me those eyes."

Liam and Naomi spent New Year's Eve together in the Ghanaian capital Accra with her mother Valerie, editor of Vogue Edward Enninful and Sir David Adjaye.

Among celebrities attending the inaugural Full Circle Festival, Naomi was also accompanied by a Vogue film crew.

On January 2, Naomi posted a video of Liam dancing with Anglo-Nigerian actress Eku Edewor during their stay in Ghana.

In recent weeks, fans have wondered if Liam and Naomi will become the next big celebrity couple, despite a gap of 23 years.

Liam is largely single since her separation from Cheryl last summer, after two years of dating, and her 22-month-old son Bear, but a brief affair with model Cairo Dwek.