imported air

[magnitofon11]

Reading a lyrics of one song of Blondie I've come across the following expression "She's like a millionaire walking on imported air..." What does actually imported air mean in this phrase?

Thanks a lot.

[Tdol]

I think it just sugests the kind of luxury that only a millionaire could afford.

[magnitofon11]

Yeah, that`s true. I didn`t see it from that point of view, now it does make sense to me.
Thanks tdol for your ever so fast replies.

[Tdol]

Mind you, you do know the expression 'walking on air', do you?

[magnitofon11]

I think that means being extremely happy, e.g. I was walking on air when I knew I won the lottery.
Am I right?