"Mercy" is a single from the album Rockferry by Duffy. Co-written and produced by Steve Booker. The song which has received a Grammy Award nomination for Best Female Pop Vocal Performance[1] was made available for download in the UK from February 11, 2008 and was released physically on February 25, 2008.
"Warwick Avenue" is the third single (second in North America) from the album Rockferry by Duffy. It was written by Jimmy Hogarth, Eg White & Duffy & produced by Jimmy Hogarth. It was released in May 2008, but had already charted by March and April due to download sales. It peaked at number 3 on the UK Singles Chart due to strong download and physical sales and has sold 249,165 copies in the UK to date. It is expected to be Duffy's next international release, following her hit single Mercy. The b side to the 7 inch is Loving You, and was written by Richard J. Parfitt of the 60ft Dolls and Owen Powell of Catatonia.
