Sheryl Crow, 52
Challenged by: Country singer Angaleena Presley
Crow challenges: "Please go to ALS.org and find out about ALS."
'Weird Al' Yankovic, 54
Challenged by: Unknown (at left is his wife, Suzanne Krajewski)
Weird Al challenges: Barack Obama, Pope Francis and the Dalai Lama
Julianne Moore, 53
Challenged by: Abby Lindsay
Moore challenges: Ellen Barkin, Alec Baldwin and director Bart Freundlich
Conan O'Brien, 51
Challenged by: "A lot of people"
O'Brien challenges: Jimmy Carter, Pelé and Haley Joel Osment
Sarah Palin, 50
Challenged by: Wasilla's Arctic Cat retailer
Palin challenges: Hillary Clinton and John McCain
Faith Hill, 46
Challenged by: Reba McEntire
Hill challenges: Nicole Kidman, Rita Wilson and Adam Sandler
Kevin Bacon, 56
Challenged by: Kenny Loggins
Bacon challenges: Actors James Purefoy, Shawn Ashmore and Sam Underwood
Stephen King, 66
Took the challenge in honor of: "My friend Rocky Wood, who suffers from ALS."
King challenges: Fellow best-selling author John Grisham
Jennifer Aniston, 45
Challenged by: Her fiancé Justin Theroux
Aniston challenges: Charlie Downey, Chelsea Handler and Howard Stern
Helena Bonham Carter, 48
Challenged by: Actors Tom Hiddleton and Dominic West
Bonham Carter challenges: Someone, but her scream after husband Tim Burton dumped icy water over her head was so loud that the name was unintelligible.
Tom Hanks, 58
Challenged by: "As I have been dared…" he began. But the box office champion didn't reveal who had dared him or issue any immediate challenges himself.
They're fat! They're plain! They have bad hair!
These dating tips from the 1930s are part infuriating, part hilarious and completely sexist
Beauty procedures from the '20s, '30s and '40s look a lot more like a torture chamber than a salon
Norma Desmond, Blanche DuBois and Mrs. Robinson were actually a lot younger than they seemed back in the day
Six decades of dieting proves that losing weight the old-fashioned way didn't work either
Those instants when we suddenly think that maybe we ain't that young anymore