Miley Cyrus Closes Out Doors' 50th Anniversary 'Morrison Hotel' Party

The Doors snagged a ton of big-time talent, including Miley Cyrus, to help them celebrate a milestone in music -- and it seems they rocked too hard ... 'cause sirens had to respond.

The iconic rock band held a little shindig Saturday night at the Sunset Marquis Hotel in West Hollywood, where designer John Varvatos and photog Timothy White co-hosted with Jack Daniels sponsoring. It was all to honor the 50th anniversary of 'Morrison Hotel.'

It's The Doors' 5th album, and it was a game-changer in music -- further cementing the band's legacy in rock. 'Morrison' was also considered a return to form for them.

BTW, this legendary photo that was used for the 'Morrison Hotel' album cover was shot by the great Henry Diltz. Just a fun fact -- he did an entire shoot of the boys back then.

Anyway, it would appear the album left a major impact on some Hollywood's biggest stars, including Dennis Quaid, Jonathan Galecki and Michael Bolton ... all of whom showed up to play a tune in tribute to TD. Some of them even played with The Doors themselves -- especially Doors guitarist Robby Krieger, who jammed with everyone.

All acts were accompanied by the house band, the Tangiers Blues Band. Then came Miley's closeout performance, which we're told was awesome ... but also a bad omen.