There's still time to catch Beach Break Live, a music festival which is taking place at Pembrey Country Park in Carmarthenshire from today (June 14th 2010) until Friday.
The theme this year is musical legends, so the King of Pop could be the perfect star to emulate while watching bands such as Vampire Weekend, Chase and Status and many more.
Alternatively, you could opt for a Madonna fancy dress costume from her Like a Virgin days if you want some added glamour and even more '80s nostalgia.
Should you want to plan your festival-going in advance, there is also Camp Bestival which will take place in Dorset between July 30th and August 1st 2010.
This has a fantasy fancy dress theme, so is sure to be fun for all the family.