I guess when you have been listening to music for as long as I have, it might be difficult to pick out an all time favourite song ... but for me that's easy! - it's always going to be this one :-)
An awesome live performance - God Bless YouTube :-))
The full version with Stephen Housden's fantastic guitar solo is here (8 1/2 minutes)
For a heavy dose of 70s nostalgia (and poster art) watch this video
LRB - From the country that brought you Kylie, Fosters and Edna Everage!