Joe Jonas has a heart of gold. The singer (and serial dater of super hot women) tweeted a video that he filmed specifically for a fan named Amber who resides in Chicago and that he met last year. Amber clearly made a lasting impression on the middle Jo Bro, so much so that he issued this call to action to other fans in the Windy City to help support her.

He called Amber "an amazing person" and shared that he made her acquaintance at a radio concert in 2011. He revealed that she has a brain tumor and is doing everything she can to "battle it out." There is a benefit being held in her honor, hosted by her friends. It's meant to bring awareness to her situation and to raise some funds to help pay her bills. Jonas refers to Amber as "special" and then says, "If you are watching, God bless you. I am praying for you every day."

Aw, how sweet this video is. Amber is probably over the moon that Jonas took the time to do this for her. It's indicative of his kind soul.

Jo Bro fans in Chicago, heed Joe's call and support Amber.

Watch Joe Jonas' Video