In between solo pursuits, he has been a contributor to Alex Bugnon's "As Promised", with a smooth-jazz version of Mary J. Blige's "All That I Can Say", featured on "In Your World" with Twista & The Speedknot Mobstas, a very up-tempo track on the soundtrack of "Doctor Dolittle", and on the Cafe Soul All-Stars CD with a single titled "Used to Be".
Additional collaborations throughout his career include: "Round and Round" and "No Sunshine" from the CD Phuture Flava, "Love You More Than Words Can Say" from the CD Soul Blitz Allstars, "I Hope That We Can Be Together Soon" (a duet with Miki Howard), "You Are So Fine" (a duet with Shae), "Can't Wait to Be with You" from the DJ Jazzy Jeff & The Fresh Prince release Code Red, "I Wanna B Ure Lover" from the F.S.
At the end of 1994, Williams was also part of the group Black Men United for the hit single "U Will Know" for the film Jason's Lyric and its movie's soundtrack album, along with El DeBarge, Al B.
He also had a cameo appearance in the 1990s police drama New York Undercover as "the singer", performing "Stranger in My Life", in the episode titled "The Shooter".
[citation needed] In October 2017, Williams was arrested and charged with misdemeanor theft, accused of stealing a $99 pair of JBL headphones from a Kohl's department store in McDonough, Georgia.
He openly talked about his illness causing him to lose weight drastically down to 129 pounds and admitted that it was hard to pick up a fork to feed himself.