Listen to You Are a Knave! (Grimaldi and Vasques) [feat. Joni Fuller] online. You Are a Knave! (Grimaldi and Vasques) [feat. Joni Fuller] is an English language song and is sung by Robert L. Yapchanyk and Eric Butterfield. You Are a Knave! (Grimaldi and Vasques) [feat. Joni Fuller], from the album 'Tis Pity She's a Whore: A Pop Opera, was released in the year 2017. The duration of the song is 2:24. Download English songs online from JioSaavn.