After verifying the information in my knowledge base, I found that I have sufficient factual information about the L.A. Mass Choir. Here's a brief biography:

The L.A. Mass Choir is a gospel music ensemble from Los Angeles, California. Founded in the 1990s, the choir is known for their energetic and uplifting performances, blending traditional gospel with contemporary styles. With a large and diverse membership, the choir has released several albums, including "Come as You Are" and "The Mass Hits!", which showcase their powerful harmonies and inspiring lyrics.

The choir's music often features a mix of classic gospel songs and original compositions, with a focus on spreading messages of hope, love, and redemption. Over the years, the L.A. Mass Choir has collaborated with various artists and has been involved in several gospel music projects, earning them a reputation as one of the leading gospel choirs in the United States.