Their success was short lived as Wendy Williams left in August 2001 to go back to New York City to do afternoons on WBLS. Colb left WUSL six months later in March 2002 to help launch sister station WWPR-FM in New York City. From 2002 until 2011, WUSL was the only urban contemporary station in Philadelphia. At that point, Radio One's WPHI-FM switched formats to urban contemporary from rhythmic contemporary under the direction of program director (and former Power 99 host) Colby Colb. WUSL and WPHI competed in the early/mid 2000s in one of the most closely watched radio battles in the U.S.