Singer Rihanna arrives at the 55th annual Grammy Awards in Los Angeles, California February 10, 2013. [Agencies]

LOS ANGELES - There were no "wardrobe malfunctions" but stars at the 55th Grammy Awards were not covering up either, despite being asked to dress "appropriately."

Presenter Jennifer Lopez, wearing a black off-the-shoulder Anthony Vaccarello gown slit up her thigh on one side, joked about her attire.

"As you can see, I read the memo," said the diva who caused a stir a few years ago when she appeared at the Grammys in a Versace gown with a neckline that dropped below her navel.

"You inspired the memo!" said her co-presenter Pitbull, getting a big laugh from the audience.

Broadcaster CBS last week issued a memo asking that Grammy performers and presenters keep their breasts, buttocks and genitals covered up.

"I thought about the dress code. And thought about it again. And that's about it. I respect it. See, I wore clothes," Destiny's Child singer Kelly Rowland told reporters backstage of her black Georges Chakra gown that featured several strategically placed cutouts.