Stephen Marco DellaGrottaglia Rezza (born November 3, 1993), is an American singer, songwriter and record producer from Los Angeles, California. He is known for his work with a variety of musicians, including Drake Bell, Sanjoy, Mike Taylor, and Christina Grimmie.

He dated singer and actress Christina Grimmie up until her tragic passing in June 2016. His upcoming album, Songs for Christina, is dedicated to her; the lead single "Hardmode" was released on April 10, 2020. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.