What are your favorite duets from the 21st century? We’ll use a loose definition of duet: has two singers, probably one male and one female but you can stretch that to two of the same gender if really you wish to, who each sing something more substantial than just the chorus.
I really like:
Feist and Ben Gibbard “Train Song”
Nelly Furtado and Chris Martin “All Good Things (Come To An End)”
Snowpatrol and Martha Wainwright “Set the Fire To The Third Bar”
What else is out there?