Kevin Mazur, WireImage
The lovebirds/songbirds covered Sheryl Crow and Kid Rock's 2002 hit duet 'Picture,' harmonizing (sort of) and holding each other close the whole way through. It's far from the most stellar vocal performance from either of the child stars, but it seems the dynamic duo is too distracted by their infatuation with one another to really care about the song anyway.
Bieber and Gomez top the show off with a big smooch, to the delight of their apparently hopelessly romantic audience.
The giggly karaoke performance follows a very public kiss between Bieber and Gomez at this year's Billboard Music Awards show and a recently revealed public exchange of "I love you"s.
Watch Justin Bieber and Selena Gomez sing 'Picture' together.