Alexandra Burke and Rebecca Ferguson are playing a couple of 'gigs' as part of this whole BT London Live thing for the Olympics.
Burko will sing some songs and dance a bit on August 2 in both Hyde Park and Victoria Park, while Rebecca Ferguson will probably just do the singing bit while sitting on a stool on July 31 in Hyde Park.
(Amy MacDonald and Alyssa Reid will also be playing different dates but we're not too bothered about them to be honest.)
All the shows are free, which is probably just as well really, and there's more information about it all here.