Allison Williams, Rihanna and Alicia Keys Credit: Jason Merritt/Getty Images (3)

Here's what you need to know about the dresses worn to the Grammy Awards show at the Staples Center in Los Angeles Sunday night, Feb. 10: To our dismay and to CBS' delight, there were no nip slips, no exposed thongs, no buttock cracks in evidence.

Perhaps in sync with the network's call for modesty, many a star hit the red carpet wearing the color black. In fact, a whopping 7 out of the 11 celebs who made our list wore the sophisticated hue. Black gowns may sound like a snooze, but when worn with daring cutouts (as did the two Kellys on our list -- Rowland and Osbourne) or a seemingly missing panel (see Jennifer Lopez's exposed whole leg), they are anything but.

Check out our gallery of best-dressed stars and tell Us: Did your favorite dresses make the list?