America's Billboard Hot 100 singles chart has never had a more suitable number one - nothing can budge Beyonce Knowles' IRREPLACEABLE. The hit began its sixth week at the top of the charts yesterday (11JAN07). The track also tops the Hot R+B/Hip-Hop Songs for a seventh week and returns to the top of the Pop 100 for a fourth non-consecutive week. Akon's I WANNA LOVE YOU rises to number two on the new chart, while Fergie's FERGALICIOUS drops a place from two to three. The highest debut belongs to Academy Award winners Three 6 Mafia, who enter the charts at number 85 with DOE BOY FRESH.