Justin Timberlake has extended his rule at the top of the US charts by scoring a fourth week at number one on the Pop 100. The pop superstar's new album FUTURESEX/LOVESOUNDS debuted at the top of the album charts yesterday (20SEP06) and now his hit SEXYBACK doubles up his success. But the former 'N Sync star has some major competition - rapper Ludacris has shot up the charts from 15 to number two with his MONEY MAKER collaboration with Pharrell Williams. Meanwhile, teen idol JoJo's TOO LITTLE TOO LATE scores a new chart record by shooting up the charts from 66 to number three. The hit becomes the biggest jump into the top three in chart history. The previous record was Mariah Carey's LOVERBOY, which jumped up the chart from 60 to number two in 2001. Nelly Furtado's MANEATER is the new Hot 100's top debut at number 62.