After her split from Big Sean last April, Ariana Grande was rumored to be dating One Direction band member Niall Horan, who recently split from Sydney student Melissa Whitelaw.

Ariana blasted the reports of a romance with Niall by telling The Sun on Sunday, "A girl can be friends with someone with a d**k and not hop on it."

The dating rumors sparked when the two were photographed spending plenty of time together over the past week.

Horan was even spotted paying a visit to Grande's London hotel. The duo went on a VIP shopping trip to luxury department store Harrods.

The 'Love Me Harder' singer documented her shopping trip posting a black and pink stilettos on her Instagram. "#rp @saschapr if we were shoes" she captioned.

After shopping, the two went their separate ways as Horan headed to dinner at Nobu with his friends before reuniting with Grande at the Langham Hotel.

Much earlier in the day, 21-year-old the pop star was seen leaving Horan's home at 3 a.m. after reportedly spending five hours inside the mansion.

According to Daily Mail's sources, Grande arrived at the 21-year old's home at 10 p.m. Tuesday night.

Ariana's rep told MailOnline: 'Ariana is friends with Niall. He had a big party that she attended.'

E! Online reports that the party was for celebrity beauty expert Chantel Gonsalves and that after the bash, the group continued to have fun at London's Crique Le Soir nightclub.

Chantel posted on her Instagram a fun snap of her and her friends during the birthday celebration. She wrote "Always a blast with these cuties #birthdayshanagians #itsmybirthday #friends @arianagrande @niallhoran @alfredoflores"

The two music superstars also partied together in June after her concert at London's O2 Arena.

The 21-year-old heartthrob gushed about Grande on his Instagram, wherein he captioned a short video of her singing, "This girl blew me away! She has the most incredible voice I've ever heard! Superstar."