Girls Aloud and Take That are among a galaxy of stars who're doing their bit to help Pudsey Bear raise loads of cash for the BBC's Children in Need appeal.
Tess Daly, Fearne Cotton and Terry Wogan are hosting Friday's television appeal, to raise as much as possible to help disadvantaged children in the UK.
The Sugababes, former X Factor winner Leon Jackson and John Barrowman will all be appealing for donations.
And McFly will be on hand to perform their Children In Need song, Do Ya.
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Maddy finds out what McFly are doing for Children in Need
Although celebs do a lot to help raise money for the Children in Need appeal, the charity also depends on the amazing fundraising efforts of ordinary people.
In 2007, more than £19 million was raised on the night, but the total reaching a staggering £37 million after all the donations and fund-raising had been counted.