Katy Perry, 2014

Katy Perry photographed by Lauren Dukoff on April 17, 2014 at Sony Pictures in Culver City.

Lauren Dukoff

Dressed in just a black bikini, a shawl, sandals and sunglasses, Katy Perry took the ALS Ice Bucket Challenge on Tuesday to help fight amyotrophic lateral sclerosis, commonly called Lou Gehrig's disease. 

Foo Fighters Parody 'Carrie' in Brilliant Ice Bucket Challenge Video

The "Black Horse" singer posted a video documenting the event to Instagram, in which two topless men pour freezing cold buckets of water over her head. To her credit, unlike many of the other stars who have taken the public challenge, Perry handled herself like a champ, barely flinching before she nominated Madonna to take the challenge as well. 

Watch Lady Gaga Complete the Ice Bucket Challenge With A Very Gaga Twist

Watch the clip here:

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