Ice Bucket Challenge Roundup: 30 Stars Including Katy Perry, Demi Lovato + Many More Raise ALS Awareness

Lately it's been impossible to check Facebook, Twitter or Instagram without seeing a barrage of videos of people participating in the ALS Ice Bucket Challenge -- and we couldn't be more grateful! Not only is it raising awareness and a ton of money for ALS/Lou Gehrig's disease research, but it also let's us watch some of our favorite celebrities get drenched in ice cold water.

We thought the challenge reached its peak this weekend when the pop star trifecta of Justin Bieber, Taylor Swift and Selena Gomez all dumped buckets of water on their heads in the name of charity. Not so, because this social media fad is the gift that keeps on giving.

Everyone from Katy Perry to Niall Horan (still waiting on the rest of One Direction!), Emma Stone to Anna Kendrick has taken part in the Ice Bucket Challenge. We've collected 30 (!!!) of the best videos of celebs dousing themselves in ice water for your entertainment pleasure. Check out the vids below!

Katy Perry chose a pirate ship setting for her challenge!

The Vamps received some help from their pals Fifth Harmony.

Niall Horan jumped on board and did all One Direction fans a favor by wearing a white shirt.

Ben Affleck and Jennifer Garner had a ton of fun filming the challenge! Maybe Ben more so than Jennifer...

Lucy Hale wasn't messing around. She nominated a ton of people!

Keegan Allen needed a script for all of his noms!

Ashley Benson didn't look too pleased after her ice bath.

Bella Thorne took on the ALS challenge with a group of bikini-clad friends!

This video taught us that Vanessa Hudgens laughs when she's nervous!

Little Mix decided to "take it like women"! Represent, girls.

Ashley Tisdale and Zac Efron conquered the ice water together!

Anna Kendrick took the challenge and was environmentally conscious by skipping her shower to conserve water.

Calvin Harris showed off his mega-abs in his video.

How does Emma Stone manage to looks so adorable while getting drenched in water?

Lady Gaga stayed true to her character in her ALS video.

Ed Sheeran took the challenge immediately upon waking up. That's one way to get the day started!

Shakira went all out by nominating Pope Francis!

Emma Roberts couldn't pick up the bucket on her own, but that doesn't mean she escaped dry!

Lily Allen opted for a green polka-dot bikini for her video.

LOL! Britney Spears came super close to dropping an 'F'-bomb during her challenge.

Lily Collins graciously wished her noms good luck after pouring ice water over her head!

Carrie Underwood and her husband Mike Fisher needed heavy machinery to complete their challenge.

Jimmy Kimmel made his own version of the Ice Bucket Challenge!

Jennifer Lopez took the challenge with a view.

Chris Pratt drank some Blue Ice Vodka and Smirnoff Ice to ease the pain of the actual ice.

Yep, even Oprah joined in!

Lance Bass sat on a swing before unloading a bowl of water over his blue hair.

Demi Lovato took on not one, but five buckets of ice water! (Might want to watch this one in private -- there's some NSFW language!)

Keith Urban chose a massive bucket of water for his challenge vid!

Gwen Stefani helped soak Jessica Alba, Gavin Rossdale and Nicole Richie!