Katy Perry Grammys Dress 2013: See The Singer's Red Carpet Look! (PHOTOS)

Katy Perry posed for photos in a sexy Gucci gown as she arrived at the Grammy Awards in LA tonight. Katy didn't bring along boyfriend John Mayer to the red carpet, instead choosing pal Allison Williams as her date. Earlier

Katy Perry may have walked the Grammys 2013 red carpet with her good friend Allison Williams -- but it wasn't just a ladies' night! Perry joined boyfriend John Mayer, and Williams met up with boyfriend Ricky Van Veen inside the show Sunday, Feb. 10.

Grammy Awards 2013 Worst-Dressed Celebrities: Jennifer Lopez' Slit & Katy Perry's Boob Window Flopped (PHOTOS). The Huffington Post | By Christina Anderson Posted: 02/10/2013 11:11 pm EST | Updated: 02/11/2013 4:32 pm EST

Flubalubalubalub, does this pear count as one of my five a day or two. dirtyboy: Flubalubalubalub, does this pear count as one of my five. http://www.huffingtonpost.co.uk/social/dirtyboy/grammys-2013-katy-perry-dress-boobs_n_2659213_229127426.html

Katy Perry & John Mayer: Sony Music Grammy After Party!