One Direction have been rehearsing to the sound of screaming girls.
1D have apparently been distracted by the noise of fans during performances and have now started practicing their songs to a recorded track of fan noise.
A source told The Mirror: “It helps them manage their vocals. There’s little point rehearsing in an empty arena because it’s completely different when the venue is filled with people making noise.
“Adding screaming sounds is the only way to make the sound check realistic.”
This news follows on from last year when Louis said he’d gone a bit deaf in one ear!
“It’s tinnitus – something like that.