While Carrie Underwood has kept it classy and elegant the past 5 years, not everyone got the same memo.
In 2012 LeAnn Rimes sported a short, cutout dress that didn't leave much to the imagination ... and KISS, well, they came dressed in full KISS costume.
We've also seen stars like Julianne Hough and Nicole Kidman hit the arrivals line in hit-or-miss fashions through the years.
And Taylor Swift, she just loves those princess dresses.
Check out some of the best and worst looks from the past five years in the gallery above -- and be sure to come back later on tonight for all the red carpet fashion from this year's show!
