R&B singer Vesta Williams — best known for her 1989 hit "Congratulations" — was found dead in an L.A. hotel room yesterday.

Loads of Vesta's celebrity friends have posted messages on Twitter about the news — including actress Jackeé Harry who wrote, "…just received truly devastating news: R&B great, and my friend of many yrs, Vesta Williams (@vesta4u), has passed away. #RIPVesta"

48-year-old Williams had a string of R&B hits in the 80s and 90s including "Once Bitten, Twice Shy" and "You Make Me Want To (Love Again)."

UPDATE: Law enforcement sources tell us … Vesta was discovered in a hotel in El Segundo. Officials do not believe foul play is suspected.

Check out her hit single below:

[youtube:http://youtu.be/vx22vCbqurA]