Industry News Beyonce Knowles' 'Irreplaceable' tops Billboard Hot 100 for 4th week 12/21/2006 U.S. singer Beyonce Knowles has topped Billboard's Hot 100 and Pop 100 for yet another week thanks to her "Irreplaceable" track. Read More RELATED NEWS Jimmy Fallon's 'The Tonight Show' dropping to only four nights a weekAshley Tisdale announces birth of her second childSelena Gomez is a billionaire TAGS: Fergie Beyonce Nelly Furtado Justin Timberlake John Lennon Yoko Ono
