DRESS UP IDEAS????????Running out of time

Hi All

We have just found out that the party we are going to this year is now dress up. The theme is ROCKSTARS AND GROUPIEs.

I need a quick, easy and cheap idea. For my hubby, myself and my two Dauthers. 4 years and 19months,
ANY IDEAS WOULD BE REALLY HELPFUL.

I went as Amy Winehouse to a party once.. that was an easy costume and had heaps of fun with it.

john lennon and yoko ono??
ummmm for the kids how about one as sonny n the other as cher??