By far the lady of the night, Adele emerged looking better than ever wearing a custom Giorgio Armani gown and a lighter, blonder hair-do.
Country sweetheart Underwood was striking in a Gomez-Gracia long-sleeved, backless gown that featured beautiful sequined detailing.
The curvaceous country crooner looked gorgeous in an embellished Pavoni gown as she strolled the red carpet on the arm of hubby and fellow country star Blake Shelton.
Continuing his love of '50s style, Bruno Mars looked as dapper as ever when he arrived in a suit by designer Tom Brown.
With her killer body, it's hard to imagine the Black Eyed Peas singer ever looking bad. But when Fergalicious showed up at the Grammys in a revealing Jean Paul Gaultier haute couture gown, she left little to the imagination and little reason to put her on the best-dressed list.
It's hard to wear Elie Saab and look bad, but the newly single Perry proved that, given a bottle of blue hair dye, that feat is possible. Clearly, Perry was still channeling her role as Smurfette from last year's The Smurfs.
Flying nun or Little Red Riding Hood? Whatever she was, Minaj got attention for all the wrong reasons when she stepped out in a beaded Versace cape with a Pope look-alike on her arm.
There might have been some in the TV audience who didn't know who Swedish singer Robyn was, but after last night's ceremony they know one thing: Her fashion choices are questionable.
Although she usually favors princess gowns during award-show season, Swift took a risk with a nude-colored, silk mermaid gown by Zuhair Murad. Although we applaud her break from routine, the gown's high neckline coupled with her pulled-back hair made for a look that was much too severe.
The night's trend
With the death of legendary singer Whitney Houston hanging over last night's ceremony, it was no surprise that the biggest trend on the red carpet was the color black. From YouTube star Rebecca Black to pop star Rihanna, the majority of attendees paid their respects to the late songstress with the color of their evening wear.