See Taylor Swift Take The Ice Bucket Challenge
We all know that Taylor Swift has got a good heart - as she proved recently when visiting a sick young fan.
But the 24-year-old country pop superstar has shown that she's prepared to suffer for a good cause too.
Having been nominated for the popular "ice bucket challenge" by supermodel Lily Aldridge and singer-songwriter Ingrid Michaelson - she teamed up with actress pal Jamie King to do her bit to help research into amyotrophic lateral sclerosis.
T-Swift says: "I wanna nominate Selena Gomez, Emma Stone and Ed Sheeran."
And Jaime nominates "Lena Dunham, Topher Grace and the cast of Hart Of Dixie".
They then wave wads of $100 bills and explain that they are donating the cash on behalf of the assembled crowd.
And Swift exclaims: "Oh dear God, we're gonna do this!"
They then count down from three to one before pouring buckets over one another - as the group of people around them do the same.
Both completely drenched, the pair scream at each other for a few seconds before King begins applauding - but Swift continues to scream until the clip ends some seconds later.
Watch this space to see who takes up the challenge next.