Big W Livingston WA are having a clearance on their PS2 Singstar titles (which can be used in a PS3 as well, provided you have one PS3 Singstar game disc, in case PS3 owners weren't aware)
The Wired Microphones are also on clearance for $25, had about 5 packs left that I saw.
Not sure if this is a store special or available at other Big W stores as well.
Good find. Jbhifi online have the ps2 singstars going for $29 but im not too sure about postage costs