Two years after winning "The Bachelor," Shayne Lamas finally got married ... to another dude ... in Las Vegas.

Shayne Lamas -- Dirty Vegas Wedding
Last night, Lorenzo's daughter tied the knot with Nik Richie from at the infamous Little White Wedding Chapel -- the same spot where Britney had her quickly-annulled wedding to Jason Alexander back in 2004.

Right after taking the plunge, we're told the two "honeymooned" at Vanity nightclub at the Hard Rock Hotel.

Hopefully these two will make it longer than 55 hours.

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