I just heard that one of Classic FM's lots on its Charity Christmas Auction is as follows:

4 “best in house” tickets to see Katherine Jenkins on 13 March 2010 at the O2.

Backstage passes for 4 to meet Katherine after the show.

Lunch at Avista in Mayfair for 4 people
Overnight stay with breakfast for 4 people at the Millennium Hotel.

"This auction lot is offering you the chance to bid on 4 of the best seats in the house to see Katherine Jenkins concert at the O2 followed by an opportunity to meet the stunning Welsh classical singer back stage after the concert."

Sounds awesome, thought I'd share!