Today on Classical Music in Popular Songs, it's A Lover's Concerto from The Toys. Anyone who took piano or violin lessons as a kid (or whose kids have) probably recognizes this tune, Bach's Minuet in G Major from the Anna Magdalena Notebook (BWV Anh. 114) (but possibly Christian Petzold and not Bach). Ton Koopman plays an elegant version of it on a gorgeous-looking harpsichord.