Adriana M. Barraza / WENN 1 / 8
Adriana M. Barraza / WENN 1 / 8

Rapper Macklemore has joined the army of support for a gay student who was recently kicked out of a Christian university after learning she proposed to her girlfriend at one of his gigs.

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Danielle Powell was expelled from Grace University in Nebraska just months before her graduation after school officials discovered she is a lesbian and in a committed relationship with her then-girlfriend, Michelle Rogers. Powell was then sent a tuition bill for a semester she wasn't allowed to attend, prompting her to challenge the school board.

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Her case quickly became a news story and now more than 64,000 supporters have signed an online petition opposing the college officials' actions.

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"Thrift Shop" hitmaker Macklemore has now joined her fans by offering up a tweet and a link to the story online. He writes, "I cannot believe this is happening in 2013."

Powell, who has been offered a full scholarship to Roosevelt University in Chicago, proposed to Rogers live on stage at a Macklemore & Ryan Lewis show last year.