Spencer Pratt won't legalize his Mexican marriage to Heidi Montag. Huh?

Sleazy scammer Spencer Pratt used the final moments of "The Hills" season finale to nix his plan to make his Mexican quickie wedding to Heidi Montag legal in the U.S.

For the momento. Wow. What a cliffhanger, huh?

After their Nov. 19 south-of-the-border nuptials, Heidi and Spencer pledged to make their union legal stateside. Pratt told Ryan Seacrest recently they had married again in a Beverly Hills courthouse.

Why do we doubt that?

Pratt told Seacrest on his KISS-FM radio show: "We checked the confidentially box, so good luck [finding our marriage license] people!"

Oh, I dunno. TMZ has ways ... and they've been calling this union fake from the get-go.

So was all this Mexican wedding nonsense just part of the "Hills" drama and possibly a big fat publicity stunt to get endorsements and payola for their real wedding?

Cause you know these two never do anything without getting paid and photographed.

Wonder which mag would be stupid enough to pay money for this tacky twosome's real wedding pix?

In case you want more Spencer and Heidi:

Spencer and Heidi elope!

John McCain is thrilled by Heidi Montag's vote. But why?

Heidi Montag and Spencer Pratt are (big surprise!) freeloaders

Heidi Montag gets her hands dirty

Spencer admits margaritas made Heidi marry him

Photo: Could there be a more phony "don't-mess-my-lipgloss-for-the-photos" peck than Heidi and Spencer's disgusting pucker at "The Hills" season finale party? We think not. Credit: WireImage