Soul newcomer Duffy has held on to the number one spot in the U.K. singles chart with MERCY for the second week running. The Welsh singer fought off competition from H Two O's Rockstar, with Nickelback's Rockstar falling to number three. Basshunter's Now You're Gone is a four, while Kylie's performance of Wow at Wednesday's (20Feb08) Brit Awards helped propel the single 13 places to number five from last week's number 18. Meanwhile, The Feeling's sophomore effort Join With Us debuted as the U.K.'s best-selling album, with Nickelback's All The Right Reasons stays at number two. And the power of the Brit Awards was also evident in the album charts, with Amy Winehouse's Back To Black back in the number three spot, Mark Ronson's Version at number four, and Mika's Life In Cartoon Motion at number five.