Spurred by Kelly Clarkson‘s recent comments that she has been unable to find a suitable duet partner, Jimmy Fallon offered his services on last night’s The Tonight Show. Together, the couple sang a dozen duets in a four-minute mega-medley. Much like Fallon’s ongoing History of Rap series with Justin Timberlake, the late-night host and the “Heartbeat Song” singer take a similar journey through five decades of chart-topping duets, kicking things off with Sonny and Cher’s “I Got You Babe” before bringing it on home with Lionel Richie and Diana Ross’ “Endless Love.”