The second one.

Neither. I don't like her.

I love both - but I adore the red one. Of course, I think part of love is due to the fact that she's donating the dress to charity.

I both! She's FAB!

I love her! I don't really know why she was there (other than to show off her charity dress) but she's fabulous anyway.

She looks stunning in both but the Dior is my favourite.

if heidi wants to be there, let her be there!

wasn't the red dress Galliano?

Love them both!

It's pretty over the top is all. She can shine any night, but it's just a bit too much silver especially....

I feel like that silver dress is just very grammy awards or mtv awards... just my opinion, but either way she is just gorgeous!

love her!!!!

I love both. She looks amazing

Without a doubt the Dior

The Dior, she looks stunning.

they're both so different but she really looks fantastic in both!

that dress is FIERCE!

Go Heidi!!

I adore the dress dior dress!

she looked more FAB on the red carpet(Oscars)

I love both but I think the Dior dress is much more glamorous!

The red Galliano dress is my fave.

They both are great, but the Dior is amazing!

can't choose, both are breathtaking!

She looks gorgeous in both!

If shes going to go, go in something demure. I mean it wasn't her night to shine besides the dress going to charity.

Loving both of them.

That red dress is simply DELICIOUS!

However it's not a Dior it's a Galliano.

I love both dresses, but I must ask: why is she at the Oscars?

so WHY does she get invited every year???

i think she looks great in both of them! however, a closer look at both outfits has me wanting to switch up some of her chosen accessories for less matchy-matchy ones. at least she can pull it off!

the 2nd one. i think i'd like the first one better if it didn't have the cape thingamabob

i love them both.
and if hannah montana can go to the oscars, heidi definately should be able to.

im loving the short one! but i voted for both since they are so fab and so different.
ughh.... i want.

I like the red one better. The second look is just too much silver- silver dress, sliver shoes, silver bag, and silver jewelry, aahh. Plus, the whole sequin/metallic look was so two months ago!

The short silver one is hot!

I agree with GlowingMoon. She's too skinny, no shape, no butt and nothing special. Her hair looked ridiculous.

Loved both however I have to go with the gorgeous Dior gown.

Heidi is one of thoes women who look great in everything , i like both of the dress on her ,so, i voted can't choose

The red one is now, in my mind, going to be considered a classic Oscar dress. It's right up there with the orange 20's gown Charlize Theron wore many years ago (and, for that matter, there are a lot of other gowns too that I loved!!)

The Dior, I love that dress

it's hard to choose i go with both.she looks good in ANYTHING!

I simply adore the red dress. It's amazing!

isn't the red dress john galliano

oh i remember he has a line or whatever with dior.. oops.

I love both, but the red one is truly special I think. It's like she JG took a fairy tale-dress and made it more modern and sexy, and turned the wicked stepmother into something really fab.

She looks beautiful in both. I think the red dress would look better with a smaller train though. And as beautiful as Heidi looks in the silver outfit, it doesn't feel appropriate for the occasion -- it's more fitting for a Maxim party, or the grammys as someone mentioned earlier.

They're equally hot, in a different way

that bow around her neck annoys me and I feel that she can't easily move because of it, not original and ruins the whole look..