Usher is U.S. N.1 for a third week.
"Love In This Club," which features Young Jeezy, has topped the Billboard Hot 100 for the whole of March.
Chris Brown's "With You," Flo Rida's "Low," Sara Bareilles' "Love Song" and "Don't Stop The Music" by Rihanna fill the other top 5 spots.
Leona Lewis' appearance on Oprah has helped to her first US top 10 hit as Bleeding Love shot up the charts from 21 to eight.