Overheard in My Car

Not overheard so much as just heard:

Me: [blah blah blah] Australia would be fun!
Sister: Australia would be awesome.
Me: Yeah, and--
Sister: NO, AUSTRALIA WOULD BE AUSSIE-SOME!!
Me: ....
Sister: [laughing hysterically]
Me: ... I have ... no words ... to express how appalled I am right now.
Sister: AUSSIE-SOME! I am GENIUS!

My sister makes me laugh every day.