The best replacement for duffy is adele.

The best alternatives to duffy are rated as following:
★★★★★  adele
★★★  amy winehouse
★★  russow
★★  lassa
★★  andrea mitchell
★★  duffy
★  overeem
★  howland
★  winehouse
  kreitlow
  walsh
  viv graham
  conor mcgregor
  pat kreitlow

Your alternative for duffy is not listed? Suggest!
Speaking about duffy, one probably shouldn't forget about mercy.

Other search terms related to duffy and their ratings are:
★★★★★ mercy
★★★★ andrea mitchell
★★ jools holland
You have in mind a companion for duffy and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of duffy in all years. Click on graph for more.
duffy
adele
amy winehouse