A-List Stars Attend Met Costume Gala

Justin Timberlake, Victoria Beckham, and Katy Perry were among the many stars that attended the annual Metropolitan Museum Costume Institute Benefit in New York last night, PEOPLE reports. Celebs donned their most extravagant fashions for the "Model as Muse: Embodying Fashion"-themed event.

Rihanna stepped out for the first official time since her February domestic violence incident with Chris Brown in a daring tuxedo-inspired Dolce & Gabbana ensemble, drawing raves from Twitterers:

1. 
   mrswindycity Rihanna at the Costume Institute Gala...I loved it: I think Rihanna was appropriate and stunning.
2. 
   xoPearl OMG!...only Rihanna could pull this one...http://tinyurl.com/df2r6g (FIERCE!)
3. 
   alishadsc ok rihanna's ENTIRE style has officially been inspired by prince
4. 
   klucassm @DoubleXMag Rihanna was HOT in that tux. Amazingly so. She's donned weirdo outfits and genderf*cky stuff before so it isn't out of the blue.

The Twitterverse wasn't as keen on Madonna's Louis Vuitton mini-dress and pointy headpiece:

1. 
   Modern_Domestic Not digging a lot of the "looks" in the Times Met Gala photos. Esp. Madonna, Katy Perry & Brooke Shields:
2. 
   judithsthoughts @BruinBrian seriously. ugh. i hope lady gaga doesnt feel like her pantless fashion has now been vindicated by madonna.
3. 
   opethestylist @Parmie Madonna was thinking that she was one of the models on the runway. She went a bit too far but it made for interesting fashion. ;-D
4. 
   ZSylvester http://twitpic.com/4m5sr Madonna was a hot mess at the Costume Institute Gala...eeeek!!

You can see many celebrities and their outfits in PEOPLE.com's video coverage.