On this day in music history: August 5, 1989 – “On Our Own” by Bobby Brown hits #1 on the Billboard R&B singles chart for 1 week, also peaking at #2 on the Hot 100 on the same date. Written by L.A. Reid, Babyface and Daryl Simmons, it is the fifth R&B chart topper for Boston, MA born vocalist. While his multi-platinum second album “Don’t Be Cruel” is still riding the charts, Bobby Brown is asked to write a song for the soundtrack for "Ghostbusters II", the sequel to the 1984 mega blockbuster film. Brown comes up with a song titled “We’re Back”, that the film producers like, but don’t feel that it’s suitable to be used over the films title sequence. As principle photography is wrapping, producers L.A. & Babyface, who had written and produced much of Brown’s second album, are called to write another song for Bobby. The pair offer, “On Our Own”, co-written with frequent collaborator Daryl Simmons. The song had originally been intended for Babyface’s second solo album “Tender Lover” but was not used on the project. The lyrics are partially re-written to fit well into “Ghostbusters II”. By coincidence, this is the second time that a song originally for Babyface had been passed on to Brown, having also recorded “Every Little Step” (#1 R&B, #3 Pop) for “Don’t Be Cruel”. Bobby Brown also has a small role in the film the mayor of New York City’s doorman. Released as the first single from the “Ghostbusters II” soundtrack on May 30, 1989, it is an immediate hit, and is Brown’s fifth number one single on the R&B chart. It just misses being his second number one on the pop chart, spending three weeks at number two, behind Prince’s “Batdance” and Richard Marx’s “Right Here Waiting”. “On Our Own” is certified Platinum in the US by the RIAA.