Ariana Grande Dating After Big Sean Split! 'Problem' Singer Sparks Rumors She's Seeing One Direction's Niall Horan

"Problem" singer Ariana Grande certainly has no problem moving on from Big Sean after their big split earlier this year. The former Nickelodeon star is allegedly dating One Direction hottie Niall Horan, according to multiple reports.

In a report from the Daily Mirror, Ariana Grande was allegedly spotted leaving the house of Niall Horan at around 3 a.m. on Wednesday after they partied all night.

"According to reports, the pop princess arrived at the 21-year-old star's luxury home at 10pm on Tuesday and left five hours later after hanging out with him and his pals," the publication said.

A day later, it was the One Direction member's turn to visit Ariana Grande in her London hotel, said Daily Mail.

"First on Horan and Grande's agenda for the evening was a VIP shopping trip to luxury department store Harrods," it said. "Making the most of his time off touring, Niall and his boys grabbed a bite to eat at Nobu before reuniting with Ariana at the Langham Hotel."

But Hollywood Life said that Ariana Grande and Niall Horan might not be dating at all but only collaborating on a song.

However, if indeed Ariana Grande and Niall Horan are dating, there would be no roadblock to their relationship as she has split from Big Sean and the One Direction hottie also broke up with Melissa Whitelaw after three months.

According to TMZ, Ariana Grande and Big Sean relationship took a turn for the worse when the Nickelodeon star didn't appear at the House of Blues in West Hollywood during his performance.

"Everyone showed -- Kanye, Bieber, JLo, Chris Brown, Jay Z, A$AP Rocky, Tyga, Kylie and Kendall -- everyone EXCEPT ARIANA. We're told she needed to get ready for the Grammy's the next day, which he found extremely selfish," said TMZ.

The reps for both Ariana Grande and Niall Horan denied that the two are dating.