For some, Blue Monday is saddest day of the year.  But for music fans it's one of the happiest.

The annual rockabilly festival, which started on Thursday in Attignat-Oncin, France, is one of the highlights of Europe's music scene.

This is the 15th year of the four-day Good Rockin' Tonight show, a tradition for this small town 60 miles east of Lyon and proof how Europe has has taken to the quintessential American music genre.

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The other Blue Monday -- the depressing January day that earned the moniker from mood experts -- will be a distant memory when the more than two dozen largely American bands will take the stage over four days. 

Rudy "Tutti" Grayzell -- the founder of rockabilly and festival mainstay -- won't be there but legends such as 79-year-old Johnny Powers -- he of Long Blond Hair fame -- Mike Waggoner and Graham (Matchbox) Fenton, the Rockabilly Rebel, will.

Among the other headliners are Helsinki-born Harry Fontana, Vicky Tafoya and Lance Lipinsky, the Chicagoan making his first appearance in France.

And it's not just music that brings in the crowds:  A burlesque show -- and nobody does burlesque like the French -- and U.S./France car meet are also on the docket.

You may not be able to go this year, but this is an event you don't want to miss next year.