Supporters say the Religious Freedom Restoration Act is a safeguard against businesses being forced to provide services they find objectionable on religious grounds. But opponents say the law is a license to discriminate.
The response to the law has been overwhelming and even celebrities are chiming in.
Cyrus, 22, posted a picture of Pence to her Instagram account with a message for the governor:
Indianapolis native and author John Green also took to social media to show his opposition.
"The Fault in Our Stars" author tweeted the following:
As a Hoosier, I'm deeply saddened and embarrassed. A government exists to protect its citizens; instead, it is legalizing their oppression.