Duffy

There are at least two artists with this name:

1) Aimée Anne Duffy (born 23 June 1984), known mononymously as Duffy, is a 60s-sounding Welsh blues singer - known professionally as Duffy - released her debut single Rockferry in December 2007. After relocating to London in 2006, she came to the attention of Rough Trade. She is often compared to late ’60s soul diva Dusty Springfield and has experienced significant mainstream success with the single Mercy reaching #1 in the United Kingdom.