Niall Horan enjoyed a boy's night out in London with Brian McFadden.

The 'One Direction' singer and the former 'Westlife' star hit the town after watching the Ultimate Fighting Championship at the O2 Arena on Saturday evening (08.03.14).

The pair then moved on to enjoy some drinks at celebrity haunt Shoreditch House in East London.

A source said: ''The boys were in high spirits and joking and laughing together about which one was the biggest lightweight.

''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.''

Noticeably absent from the boy's night out were the rest of Niall's One Direction bandmates who are currently enjoying some time off following their 'Take Me Home' world tour last year.

Although Niall didn't seem to be missing Harry Styles, Zayn Malik, Louis Tomlinson and Liam Payne too much as he knocked back the drinks with the 33-year-old Irishman.

The source told the Daily Star newspaper: ''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.''