On Thursday night, Timberlake brought along his real love, Jessica Biel, for his latest appearance on The Tonight Show, for a round of “best friends challenge,” a simple game where the actress and late show host had to correctly answer the pop singer’s random questions. JT wasn’t up for much banter, and he didn’t sing. Indeed, he hardly opened his mouth. The “Can’t Stop The Feeling” singer is on vocal rest, having missed a bunch of dates due to bruised vocal cords. So in a handy work-around, JT wrote it all down on cards.