Darren Criss and Deborah Cox performed at the wedding of Fab.com CEO Jason Goldberg and Christian Schoenherr on Saturday in New York City.

Criss, 25, plays gay student Blaine Anderson on the Fox musical-comedy Glee. Thirty-eight-year-old R&B singer Cox is best known for her 1998 hit Nobody's Supposed To Be Here.

Goldberg, 40, and Schoenherr, 27, married at Manhattan eatery Craft.

“Deborah and Darren have been avid supporters and promoters of gay rights and marriage equality,” Goldberg told Business Insider. “Darren in particular has been a huge supporter of the Trevor Project. Chris and I were thrilled to have them perform on our special night.”

(Related: Glee's Darren Criss says gay advocacy is a perfect fit.)

According to Business Insider, discount designer wares site Fab.com recently raised $105 million in funding.

Guests were asked to make donations to TheFour2012.com in support of gay marriage campaigns in lieu of gifts.