Carlos Sosa is an American musician, producer, composer, music director, and arranger. Heavily influenced by the R&B and funk sounds of the 1970s, Sosa founded Grooveline Horns in 1996, and is best known for touring and recording with Maroon 5, Kelly Clarkson, Jason Mraz, Zac Brown Band, and Hanson.

Love Is a Four Letter Word is the fourth studio album by the American singer-songwriter Jason Mraz, released on April 13, 2012, by Atlantic Records. "I Won't Give Up" was released as the album's first single on January 3, 2012.