Webster was suffering from brain cancer. She died at a hospital in Somerville, N.J., her firm announced.
Webster founded W&W Public Relations in 1991. She represented actress Halle Berry, basketball player Dwight Howard, comedian Steve Harvey and organizations, like Creflo Dollar Ministries.
Magic Johnson was among those who tweeted condolences, calling her a "sensational publicist."
Webster, whose parents were pastors, was an ordained minister. She wrote "It Happened in Church: Stories of Humor From the Pulpit to the Pews."
She is survived by her father, two sisters, two brothers and other relatives.
Her brain cancer death was obviously one of those "use it or lose it" deals . . .