I have had several job interviews & was asked to come for a second time in most of the cases, so I can state that my clothing didn't leave a bad impression.
I have to mention though that I showed up for jobs that didn't involve an elegant dress code (my cousin has such a job, I can ask her what she wore at her interviews, it would be interesting to have more people's opinions here anyway ;) )
At my first ever interview, I wore a red plaid short-sleeved shirt, similar to the one pictured below (be careful, it shouldn't look too casual! My checkers were small, like in the picture & the shirt had a cord that I could tie around myself to accentuate my middle) with tight black pants or a dark wash denim pencil skirt (I don't remember exactly) with ballerina shoes.
At my second interview, for another company, I wore a knitted long-sleeved v-neck pullover with the same black pants. I don't remember if I wore ballerina shoes or heels. BE CAREFUL, pullovers usually look too casual ! If you have a simple, long-sleeved shirt (which I didn't), GO FOR IT ! You can choose a skirt instead of pants, but be careful when it comes to its length. If it's one palm shorter than knee-length, it's okay.
A month ago, I had 2 interviews for 2 different companies in 1 week. I wore a v-neck shirt, a black blazer, some very confortable fabric pants that I'm very proud of (their colour is metallic grey) & black heels.
At a meeting with a CIO I wore a tight black form-fitting v-neck shirt & a pair of navy pants (not jeans).
I will ask my cousin about her interview & will post some suggestions for now.
My reccomendations, generally speaking: simple white button-up shirt, skirt (pencil skirts, for example, are awesome. they make you look soooo elegant :) ) or long fabric pants with heels.
Celebrities wearing this:
One of my favs, Lily Allen (ignore her facial expression, that is not appropiate for a job interview, lol) ! Very classy & the blouse is somewhat similar to what I wore at the meeting with the CIO.
Her biggest hit was 'Milkshake', off her album called 'Tasty'.
This album also had some suggestive but nice artwork:
By the time she launched 'Bossy' & her album 'Kelis was here', she was sporting a short do, then a partially shaved head, way before Rihanna or Cassie did it. She succeeds to look classy no matter what.
Her singles taken off her latest album, 'Flesh Tone', all have beautiful videos. In these times when Lady Gaga's videos show everything that's nasty & filthy out there, Kelis proves that you can make clean & beautiful videos while also not forgetting about the sexy & glam factor (& wearing risque outfits, like she always did & Lady Gaga does now). Her outfits, make-up & accessories are wonderful. Her looks are inspired by tribal warriors, Native Americans & African queens.
In the video for "4th of July (Fireworks)", she wows us with her fake eyelashes and studded headpieces.
What do Kelis' fans think of Lady Gaga? Well...
Kelis has always been edgy and 'to the point'. Lady Gaga seems forced and acts like needs to prove something instead of acting relaxed, like Kelis does. Kelis has nothing to prove. She's always been like that. And gorgeous.
Kelis discussing 5 of her funky looks:
Moral of the story? She doesn't take herself too seriously. You shouldn't do that either. If it's a fun party you're going to, you can choose something more funky, sequined, bright, fetish-inspired. Don't feel bad about it ! It's all about having fun.