Lily Allen has been fined $2,000 for an ice cream fight.

The 'Fear' singer received the costly cleaning bill after causing havoc backstage to celebrate the end of the North American leg of her tour.

The star wrote on her Twitter account: "Had a massive ice cream fight, dressing room based, cost me $2000. End of tour, time to get mashed. Props to natalie portmans shaved head. (sic)" Lily had performed at the Phoenix Concert Theatre in Toronto, Canada, and will enjoy a seven-day break before heading to the Magazzini Generali in Milan, Italy, on April 29.

Despite admitting she couldn't wait to get "mashed", the 23-year-old star recently blamed her wild ways and excessive drinking for almost ruining her career.

Lily became well known for her partying ways when she released her debut album 'Alright, Still' in 2006 and was worried it would detract from her music.

She said: "I took a bit of a beating the first time around. I became more famous for being a train wreck than a singer. I didn't think I was capable of writing songs and making music."