Rap is back at the top of the US pop charts as T-Pain concludes his crawl to the top with Buy U A Drank (Shawty Snappin'). The Florida rap star has spent the past seven weeks as the Billboard Hot 100 chart's greatest airplay gainer seven times. His new hit is his first US number one. Former chart-toppers Maroon 5, Avril Lavigne and Timbaland take charge of the new number two, three and four spots respectively, while 50 Cent scores the highest debut, entering the new chart at number 32 with Straight to the Bank.