One of the most popular and successful musicals in recent memory, Forever Plaid is Footlite’s cabaret production for its 50th anniversary season. This deliciously goofy revue centers on four young, eager male singers killed in a car crash in the 1950s on the way to their first big concert, and now miraculously revived for the posthumous chance to fulfill their dreams and perform the show that never was. Singing in the closest of harmony, squabbling boyishly over the smallest intonations and executing their charmingly outlandish choreography with over-zealous precision, the “Plaids” perform such ’50s pop hits as “Three Coins in the Fountain,” “Moments to Remember,” “Catch A Falling Star,” “Shangrila” and “Love is a Many Splendored Thing.” This Off-Broadway hit has a book by Stuart Ross and musical continuity supervision and arrangements by James Raitt.