Simon Cowell's new girl group Fifth Harmony wished the Tv and music mogul a 54th birthday with a toilet paper attack on his house on Monday (07Oct13).

The quintet showed up at Cowell's Beverly Hills pad early on Monday and hurled toilet paper at the property, according to

Cowell awoke to find it hanging from trees and windows. The girls, who Simon signed to a record deal after they performed on The X Factor in America last season, also hung a banner that read: 'Happy 87th Birthday Simon!'