Earlier this year, Katy Perry visited Madagascar on behalf of UNICEF and worked with the children there.  Now, it looks like she'll be doing a lot more with the organization in the future: she's just been appointed a UNICEF Goodwill Ambassador.

In her new role, Katy will focus specifically on helping vulnerable children worldwide, including those living in poverty, those under the threat of war or those living with violence, abuse and neglect. 

Executive Director Anthony Lake said in a statement, "Katy Perry is already a champion for children, and we look forward to hearing her ‘roar’ on behalf of UNICEF. We are delighted that she is joining us…and lending her remarkable voice to amplify the voices of children and young people around the world.”

Katy herself said, "I believe young people have the power to change their own lives, with our help. I am honored to join UNICEF as a Goodwill Ambassador, and committed to doing everything I can to help children and adolescents who come from such different backgrounds but want the same thing: a brighter future.”