Spencer co-wrote the Grammy and Soul Train awards nominated "Will 2K" as well as hit single "Freakin' It" and appeared as a guest artist on the song "Uuhhh".
He later went on to co-write songs for the likes of MC Lyte, Lil J, Teddy Riley, Wyclef Jean, Nick Cannon, Lil' Kim, Carl Thomas, Heavy D, Rodney "Darkchild" Jerkins, Miri Ben-Ari, Mary J. Blige as well as the singles "Freak Freak" by Grammy Award winners The Product G&B (2001) and "It Ain't My Fault" by So Plush (2002).
[2] Spencer teamed up again on Will Smith's 2003 album "Born to Reign" co-writing 7 tracks out of 14 including the leading single and MTV Video Music Award nominated "Black Suits Comin' (Nod Ya Head)".
Spencer launched his own label, 3rd Power Music Group, released the critically acclaimed mixtape "Who is Kel Spencer" in 2005, the EP "Streets know that" in 2006, a second mixtape "Brooklyn Spartans" in 2007 and a relationship based novelty album called "Salon Stories" in 2009, hosted by MC Lyte, featuring Q-tip, Def Poets, Rivaflowz, Shanelle Gabriel, Jesse Boykins III, and more.
[4] Having started an acting career in the 2010s, Spencer has garnered roles and writing/directing credits in several independent films, Web series, theatre productions, and has contributed to various voice-over projects.