"Instaoke," as it's explained on the Capital FM website, involves "massive karaoke tunes" cut down to a mere 15 seconds. Jonas has played before, previously covering Ariana Grande, 'N Sync, and Kanye West.
For his most recent go-round, the "Jealous" singer, 22, tackled a couple of hip-hop tunes, plus one of 2014's biggest radio hits. First up? Sir Mix-A-Lot's 1992 booty-loving song "Baby Got Back," which has re-entered the pop music consciousness thanks to copious sampling on Nicki Minaj's "Anaconda."
The former Jonas Brothers crooner also tried his hand at Drake's 2013 single "Started From the Bottom," and Iggy Azalea's breakout smash "Fancy," which he performed in falsetto.
At another point during the show, Capital FM host Max brought up the star's recent performance at the 2015 Miss Universe pageant, telling him it was "really cute" when he serenaded girlfriend Olivia Culpo. "She looked really embarrassed, though," Max noted.
"I think she thought, because I got down on one knee, she was like, 'What are you doing?' And I was like, 'Not that! Just this!'" he explained.
Asked whether he'd ever consider a public proposal like that on national TV, he replied, "No, that's a private moment. But we've got time for that."