Oh good grief, David Cassidy - "How Can I Be Sure". At least I can say it was the UK, and not the US (better look it up though!) Oh, and I share the same month/day with Avril Lavigne. That's not so complicated.
The Number 1 single was:
Madonna - "Into The Groove"
The Number 1 album was:
Dire Straits - "Brothers In Arms"
Born on 6th Aug:
1948 - Allan Holdsworth ( guitarist, Soft Machine )
1958 - Randy Debarge ( member of US family group Debarge )
1972 - Geri Halliwell ( aka Ginger Spice; vocalist; solo and with The Spice Girls )