Niall Horan enjoyed a very testosterone fueled night out with Brian McFadden in London over the weekend.

The 20-year-old and the 33-year-old former Westlife singer decided to head out for a night on the town after watching the Ultimate Fighting Championship at the O2 Arena on Saturday evening (08.03.14), and were spotted partying at east London's Shoreditch House. Sounds like a total swankfest ( I said 'swank')

A source said: "The boys were in high spirits and joking and laughing together about which one was the biggest lightweight (Niall. If the below picture is any indication, the whole UFC got a bit much for him at times...) Brian then suggested they order tequila and before we knew it, they were both downing the shots. They were getting on so well. After a few more tequilas, Niall got on the decks and showed off his DJ skills.'

The source added to the Daily Star: "Niall and Brian must have racked up a hefty bill as they weren't holding back with ordering the drinks. In fact they must have been pretty tipsy by the end of the night, as they almost forgot to settle their bar tab. They were mortified when they realised, but the bar staff found it funny."

They may not find it as funny if you or me went in there and did the same. Not that we'd get in there in the first place, what with it being members only 'n all.