This is from her upcoming list on her official site's page, nothing about the 26th though...

19th May - Derren Brown
24th May - The Killers Live Lounge
25th May - Beastie Boys Live Lounge
28th May - Jet Live lounge
1st June - Faithless Live Lounge
2nd June - Ross Noble

I will get this confirmed and post about it if it is.