Mueller has worked frequently with the Broadway community to raise awareness and funds for various causes including LGBT+ rights, anti-gun violence, women's rights, and adoption. She supports &lt;a href="Broadway%20Cares/Equity%20Fights%20AIDS"&gt;Broadway Cares/Equity Fights AIDS&lt;/a&gt; and has appeared on multiple volumes of their annual "Carols for a Cure" albums. In 2016, she was among numerous performers who teamed with Broadway personality Seth Rudetsky to record a cover of "What The World Needs Now" to support the LGBT Community of Central Florida after the Pulse nightclub shooting in Orlando; the movement included a benefit concert in Orlando as well as an appearance on "Maya &amp; Marty". Later that year, Mueller would again work with Rudetsky and his husband, James Wesley, to formulate the idea for Concert for America, a series of concerts supporting various social justice organizations.