Ralphi Rosario is an American house musician and founding member of the influential Chicago DJ group Hot Mix 5.

He has remixed tracks by artists including INXS, the Shamen, Jomanda, Culture Beat, Gloria Estefan, Mylène Farmer, Deee-Lite, Pet Shop Boys, Madonna, Kylie Minogue, Giorgio Moroder, Michael Bublé, Mariah Carey, Ricky Martin, Kelly Clarkson, Pussycat Dolls, Goldfrapp, Rihanna, Taio Cruz, Katy Perry, and Beyoncé.

On December 1, 2011, it was announced that Rosario, with producing partner Abel Aguilera, received a 2012 Grammy nomination for the Rosabel Club Mix of the Rihanna track "Only Girl (In the World)".

[2] In December 2016, Rosario notched his second solo Billboard Dance Chart #1 single for "Button Pusha" which features the vocals of Aneeta Beat.

[3] and "F*ck Your Boyfriend" featuring Francesca Catalano[4] In May 2017, his latest collaboration with Abel Aguilera under their Rosabel alias, garnered Rosario another Billboard Dance Chart #1 single with "Anthem of House".