In music a reprise (pronounced /rəˈpriːz/ ruh-PREEZ; it does not rhyme with "surprise")[1] is the repetition or return of the opening material later in a composition such as occurs in the recapitulation of sonata form, though it originally (18th century) was simply any repeated section, such as is indicated by beginning and ending repeat signs. WikiPedia
Ok, alright...some of you already sent me emails asking about the song...I remember hearing it on the AM stations in town when I was a kid. (Ahem). So why should I be the only one with it stuck in my head today. Here is a video of The Mamas and The Papas singing Monday, Monday.