A lot of celebrities wear the same dresses from time to time. But who will prevail in a fashion face-off featuring foxy Hayden Panettiere and Jessica Simpson?

The Heroes superstar took Manhattan by storm with her very sexy “What Comes Around Goes Around minidress back in September, while Simpson dazzled in a very similar sequined minidress at a Clothes Off Our Backs event in L.A.

Who wore it better, Hayden Panettiere or Jessica Simpson? You tell us!

They may deny any sort of romantic relationship, and Heroes co-stars James Kyson Lee, Masi Oka and Kristen Bell have all said they’re not an item.

But come on. We all know Milo Ventimiglia and Hayden Panettiere are an item. Enough with the denials, just admit it already. We approve of Halo!

The latest sign that Milo Ventimiglia has been showing Hayden Panettiere his affections? He bought her a ring… from Tiffany & Co.

According to In Touch Weekly, Milo, 30, gave Hayden Panettiere, 18, an 18-karat yellow gold ring worth $1,950 as a belated birthday present.

The ring, called Somerset Heart, features a woven band and a heart, and according to the magazine, is inscribed, “Sweet like Hayden.” Awww.

Hayden Panettiere’s co-star on Heroes, Jack Coleman, recently opened up to Entertainment Weekly about what makes Hayden a great actress.

Pointing to one scene from the episode “Company Man” as well as Hayden’s hard work and positive demeanor, here’s what Jack Coleman had to say…

Entertainment Weekly: You have great chemistry with Hayden Panettiere — was it easy for you to develop a rapport with her?

Jack Coleman: The scene that we did in the pilot where I come home and she comes running into my arms, we’d known each other for about 45 seconds when we shot that. I was the guest star. I come out of my trailer, we’re about to shoot, she comes out with “Daddy!” I thought, “Wow, this is a very open actor.” I was really kind of blown away.

Hayden Panettiere has chemistry with everybody. She’s invested in whoever she is looking at and acting with, and I think that’s something that’s really special about her. She’s very savvy about the camera, but she’s not giving it to the camera, she’s giving it to the actor. We had a scene right before “Company Man” where, in the hospital, she finally blows up and yells at me. We had to do a lot of coverage of her, and she’s crying throughout, for several hours, and it’s exhausting.

And we did all her coverage, and then the camera came around and shot me, and all the tears came, and she’s off-camera. Hayden Panettiere invests. It’s funny, all this talk in the media about her being another “teenage starlet” wondering if she’ll go the way of other young celebrities.

People need to pay attention to her work. Her work is really good. It’d be nice if people talked about that sometime instead of just everywhere she’s going, or who she’s dating, and whether or not she’s going to run off the rails.

And by the way? I don’t see that happening.

The amazing Hayden Panettiere participates in a fundraiser and auction at her younger brother Jansen Panettiere’s private school in Beverly Hills, Calif.

The 18-year-old actress donated “A Day on the Heroes Set” with herself as the personal escort. The auction earned $4,000 for the school’s funds!

She may be the star of Heroes, but she still keeps it real with the family. In this photo of Hayden Panettiere, you can see she’s out with her mother and manager, Leslie Panettiere, and her little brother, Jansen Panettiere, at a Halo party in Hollywood over the weekend. She looks great!

Hayden, Leslie and Jansen Panettiere.

Hey, even a natural beauty needs to be pampered sometimes. She deserves it, don’t you think? In this photo, Hayden Panettiere pays for a manicure and pedicure at Bliss Nails and Spa in L.A. Wednesday. Just put it on the plastic!

Hayden Panettiere: Getting the full spa treatment.

That dude West (on Heroes) kind of creeps us out, the way he stalks Claire. But it’s cool how he can fly like last night! We’re a little jealous. Flying like that would be hella sweet… as would cradling Hayden Panettiere in our arms. Anyway.

Got thoughts to share on last night’s episode? Check out our sister site’s Heroes forum. Share your comments, theories, criticisms and more with fellow fans.

Fly away to our “Heroes” forum with Hayden Panettiere! 

Mmm hmm. Hayden Panettiere and Milo Ventimiglia can play it coy it all they want. Look at these two together and tell us they’re not more than friends!

Seen here at the L.A. Kings hockey game Saturday, they’re disinterested in NHL action (not that this is hard to believe) and fixated solely on each other…

  Hayden Panettiere and Milo Ventimiglia: More than friends? Obviously.

Hey, it’s all legal (she’s 18) and they’re both on the market, so why not. We are all about Halo. They can even keep on denying it if it makes them feel better.

All we know is that these two are hot stuff - and that Heroes returns with an all-new episode in a matter of hours! Discuss it in our Heroes forum!

Pumped to be back at work (on the second season of Heroes), a yellow sun dress wearing Hayden Panettiere makes a quick pit stop on her way to the TV studio to put some fuel in her Porsche Cayenne. Hot girl, hot wheels!

Hayden Panettiere: Pumped up at the gas pump!

Last night’s episode of Heroes, “Lizards,” was another great one! Our girl Hayden Panettiere was well represented as always, as were her terrific cast mates.

You can discuss the episode, and anything related to the show, in our sister site’s terrific Heroes forum. We’re really excited every Monday for a chance to see Hayden show her stuff - and to see what transpires with the rest of the Heroes!

  Without Hayden Panettiere, Heroes just couldn’t cut it.