London's Air Ambulance emergency service saved Mika's sister's life.
And the singer is repaying them in a BIG way!
Mika has donated concert and plane tickets and to a raffle to support the charity from his Mika Fan Club.
One lucky Mika fan will have two tickets to see ANY Mika concert around the world!
The London Air Ambulance saved Mika's sister when she fell out of a window and impaled herself on a metal rail in October 2010.
For each 10 pound donation, a raffle ticket is received.
Way to give back to the community, Mika!
[Image via WENN.]