Singing sensation Leona Lewis is one of a host of celebs taking part in Sport Relief, which kicks off this weekend.
The X-Factor winner is releasing the official double A-side single of two songs called Footprints In the Sand and Better In Time.
Leona also went to Johannesburg in South Africa to see how the money raised is helping people.
She visited a centre where children whose parents have died are being looked after.
Here's what she said:
The X-Factor winner is releasing the official Sport Relief song
"They're all orphans, they've lost parents, they've lost their mums, and it's so sad to actually think that if the centre wasn't there, what would happen to these children?
This experience is something I'll never forget, it's been quite life-changing for me.
I just hope so much that the single can raise money for Sport Relief, and hopefully go into these projects, and start up new projects.
To see how these children are reaping the benefits, it's just amazing what our money can do for them.
When I am singing the single it may be quite emotional, because I'll definitely be thinking about all the people I've met, and the families I've met that have been so courageous and so inspiring."