Do you love to dress up like a popstar and dance around? Well two CBBC favourites are doing it on BBC One this weekend!
Friday Download star Tyger Drew-Honey and Tracy Beaker's Dani Harmer are taking part in this year's Let's Dance for Sport Relief.
Newsround sent Nel along to catch up with the pair during their rehearsals.
Their chosen song? Well you're just going to have to watch to find out...