British pop star Lily Allen angered hundreds of partygoers when she smoked sneakily and it set off the fire alarm, forcing them all out.

Organisers of Diesel: U Music World Tour Party sent everyone out, stopped the music and asked everyone to wait patiently. Allen had sneaked in a smoke and that set the alarm bells ringing. The partygoers had to wait for half-an-hour to get back inside, dailystar.co.uk reports.

Allen backstage was still smoking when she said: "What's wrong with smoking?"

A few days back she had even said she wanted to retire from music for good. Allen said: "When you're an in-front-of-the-camera kind of girl, all you want is to be behind the camera. Everyone in the music industry is better than me. I've had enough."