Frankie Valli in Grease would dominate 1978, and "Grease" has remained a popular song ever since. Before the film, the American singer was well-known as being the lead vocalist of hit band the Four Seasons.

After the film, Valli would see more success than he could have ever dreamed of. Take a look at Frankie Valli in Grease in the video above!

Frankie Valli In Grease Career

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Frankie Valli and The Four Seasons in 1963