The two artists both pledged to match donations (up to a certain amount) to CAIR and the ACLU.

hey, i'll match all donations to CAIR up to $10,000. tweet a screencap of your receipt to me <3 anything helps <3 https://t.co/tNaqrxOm7a

— Grimes (@Grimezsz) January 28, 2017

help our queer & immigrant friends. send me your donation receipts for the @aclu & I will match up to $100K https://t.co/P9zVRH0WH0 #RESIST

— Sia (@Sia) January 28, 2017

John Legend has also donated $10,000 to ACLU:

@sacca @ACLU pic.twitter.com/iEPHPCQmqa

— John Legend (@johnlegend) January 28, 2017