Jennifer Morrison looked like a fairy tale (coincidence? I think not!) in a white gown and loose wavy hair.

Julie Bowen opted for an undone updo - very cute!

Vanessa Marano has some lovely bouncy waves that echo the hem of her dress.

Ellie Goulding's dress was daring, but she played it safe with straight hair.

Phoebe Price - what on earth? I don't even...

Adam Lambert and beau both rock sky high hair!

Seeing Alanis on the red carpet brought back memories. I love her figure-flattering dress!

Audrina Patridge's outfit and hair missed the mark for me. I think her curls are a little too big and overwhelm her! What say you?

A safe wardrobe and hair choice for Cheryl Hines, but lovely nonetheless.

Enrique Iglesias. Where do I begin? First, bathe and shave. Stat.

Heidi Klum unsurprisingly pushed the fashion envelope in a futuristic metallic cut-out dress, but paired it with retro crimped hair.

Hillary Scott of Lady Antebellum always looks lovely with her voluminous curls.

The combination of stained berry lips and Jane Levy's auburn hair is just stunning.

Jennifer Hudson's sparkly minidress was a hit!

Jennifer Hudson's hair was picture perfect sleek with some well-placed highlights.

J. Lo's gown shows off her 'assets'.

More J. Lo's signature style, she wore a tight updo with her dramatic gown for the red carpet.

J. Lo unleashed her wilder side with both her hair and wardrobe for her stage performance with Pitbull.

Jenny McCarthy accepted Adele's award on her behalf, and I think she would have been proud. Her retro hair and adorable Victoria Beckham dress looked amazing.

Joe Jonas looked very hipster-chic with a tux jacket and tee. What do you think of his supershort hair and scruffy face?

Justin's slicked back hair and velvet jacket.

Justin Bieber's outfit for his stage performance was very different - the opposite of retro!

Couldn't resist including this adorable picture of Justin and Selena. They're presh!

Beau Justin Bieber followed Selena's lead, bringing the glam in velvet with a retro hair style.

Katy Perry sure isn't afraid of color!

Katy Perry's pink hair complimented her Vivienne Westwood print dress!

Retro Hollywood Glamour was a trend of the night, continuing with Kelly Clarkson.

Mary J Blige went for the always classic animal print, and kept her hair simple and out of the way.

I think the look Nicki was going for was "sexy robot dolly". How bout you?

Never a shrinking violet, Nicki Minaj wore a pink wig and robot-inspired attire for her performance.

Sarah Hyland is on trend with loose curls and a center part.

Gorgeous Taylor Swift!

Taylor Swift opted for simple makeup and a sleek side ponytail.

Vanessa Minnillo looked beautiful with her hair in loose ombre waves.

Christina Aguilera's vocals are always hot, but this hair and dress? Not.