His wife, Lovina, confirmed the news on channel TV on Wednesday.
According to her, he has conducted some tests on COVID-19 and the results returned to positive on Tuesday.
He died on Wednesday afternoon.
Foster worked with many radio stations in the United States, including Cathy Hughes Radio One, Mix 106.5, and then moved to Nigeria in 2000 and joined Cool FM.
Shortly thereafter, he was very popular among Nigerian listeners, and a year later, he won the Best Radio Show Host of the Year award.
He also won the Media Merit Award in Nigeria for “Best Radio Personality” in 2003, 2004 and 2005.
In 2007, Foster was a judge in the one-off Idols West Africa series, along with Nigeria Dede Mabiaku and Ghana Abrewa Nana.
He was also the judge in the film Mam talent Nigeria along with actress Kate Henshaw and comedian Yibo Koko.
Two years later (in September 2009) he left Cool FM for the new Inspiration FM radio station, but left in 2014 to join City FM.
In May 2016, he left City FM 105.1 to join the Classic FM 97.3 radio station, where he worked until about three months ago.
Until his death, Foster was married to Lovina, and the couple have a son and daughter.
It is also said that he has another son from a previous marriage.