Katy Perry John Mayer Duet

Yesterday evening gave us the release of album art for Katy Perry and John Mayer's duet "Who You Love," and, yes, it's pretty damn cute. The IRL couple canoodles over a guitar, photographed by Mario Sorrenti.

It got us wondering if duets are about to have a moment again; after all, in addition to this one we've also got Norah Jones and Billie Joe Armstrong teaming up (last week they released Foreverly, their tribute to the Everly Brothers), not to mention the near-weekly co-singing happening on Glee.

Of course when it comes to duets, there are a lot of awesome ones out there--hello, Freddie Murcury and David Bowie! So to kickstart what we hope is a decade of awesome duets, we've compiled all our favorite duets ever, from Jane Birkin and Serge Gainsbourg to Morrissey and Siouxsie Sioux. Listen up, and enjoy!