(Cover) - EN Showbiz - One Direction's Niall Horan's Tuesday night barbecue reportedly got "louder as the night went on."

The singer hosted the cookout on the roof of his apartment block in London.

Niall and friends were singing, strumming on guitars and banging on drums all night long.

Although his neighbours were miffed by the noise, Niall and partygoers continued to engage heavily in the festivities.

"They got louder as the night went on," a source told British newspaper The Sun.

"Music was being pumped out and in all the excitement Niall jumped on his [life-sized] Barack Obama model and its arm came off."

In a video posted on YouTube earlier this month, exhausted-looking Niall was heard addressing a group of girls as a "shower of ****s" as he exited an airport in Ireland.

He has since apologised to fans via Twitter for using the offensive word.

"Really sorry if I caused any offence. It was just banter with fans who I think of more as mates," he tweeted. "But I understand that it's not a word I should be using at all [sic]." (C) Cover Media