Ariana Grande Spotted Leaving Niall Horan’s House at 3am

Rumours started swirling about a possible romance between these two pop stars earlier in the week and it seems they aren't doing much to quash them. Ariana Grande was reportedly spotted leaving Niall Horan's Hertfordshire home in the early hours of Wednesday morning. Niall Horan is said to be single again.  The Break Free singer was snapped leaving the Mullingar man's £1 million mansion at 3.00am on Wednesday morning, having arrived at 10.00pm on Tuesday evening. Her representative appeared to play down speculation, telling MailOnline: "Ariana is friends with Niall. He had a big party that she attended." The reports come amid speculation that Niall has split from his Australian girlfriend Melissa Whitelaw. Ariana is currently on tour.