I think it's appauling that very few big bands like Bon Jovi play the Milennium Stadium on a regular basis. In fact, in the last 15 years, Bon Jovi have only ever come to Cardiff twice.

1995 - Cardiff Arms Park
2001 - Millennium Stadium

Springsteen, Rolling Stones, Chili Peppers and U2 have only played there once since it opened in 1999, but then again they've only toured the UK twice since then. Bon Jovi on the other hand have had 5 UK tours since then have only played once.