One Direction singer Niall Horan has spoken out in praise of Example.

The British maestro was performing last night (September 17) at the Roundhouse in London as part of the iTunes Festival.

Horan went to watch the show and tweeted afterwards that it was a "great" gig, highlighting some enthusiastic fans in the middle of the floor. He said:

"Went to watch @example at the roundhouse tonight with @eoghanmcdermo @darrenf1992 , great show! serious moshing goin on in the middle."

Horan meanwhile had earlier sent a tweet to Justin Bieber, who the Irishman has been hanging out with recently in the US and the UK.

However, Bieber didn't reply as he focused on promoting Carly Rae Jepsen's new album instead.