Miranda Lambert revealed some leg and laughed about the memo.
"I thought it was funny," she said. "Country music has never really been a problem with that."
Singer-songwriter Skylar Grey let out an "oops!" when asked about the guidelines.
"I had to show the side boob," she said. "What are they gonna do, kick me off?"
Andrew Dost of fun. said he read the memo, "but all we wanted to do is go as classy and timeless as possible." Bandmate Jack Antonoff joked that he was "showing off a lot of ankle" with his high pants that exposed his sockless look.
Rihanna seemed to get the memo: The usually provocative star covered up in an elegant red gown. Taylor Swift wore a prim gold metallic floral cocktail dress by Jenny Packham to the pre-telecast awards before changing into something a bit more revealing for the red carpet. Beyonce wore a modest pantsuit. All three won early awards in the pre-telecast.
"I think it's just, you know, we should always stay classy and dress according to the event that's being held," Ashanti said on the red carpet. "So I don't think people should be limited so much and told what you can and cannot do. But, you know, you do have to have a certain class and prestige about yourself."
Even Ashanti, though, revealed a fair amount of leg and cleavage. Hey, this isn't the Oscars.
Comedian Kathy Griffin joked about the fashion warning.
"I'm here to watch all the pomp and circumstance," she said. "You want to see a lack of underwear. I'm open to all the forbidden parts."