"Stop That Dancing Up There!" was the title of a then-popular song by Harry 'The Hipster' Gibson.
Daffy Duck's impersonation is based on Danny Kaye.
When the original title sequence was lost and replaced with the standard "Blue Ribbon" substitute title card, the title was spelled "Book Review", spoiling the pun. The original has since been found and restored on the "Looney Tunes Golden Collection: Vol. 2" DVD box set.