Alexandra Burke sings for Children in Need
Famous pop-stars are taking over West End theatres to raise money for BBC Children in Need.
The BBC charity's appeal night is coming up in November, and their idea called Pop Goes The Musical gets famous singers to perform in West End shows.
X Factor winner Alexandra Burke took to the stage in the world's longest running musical, Les Miserables.
Find out more about Pop Goes The Musical on the Children in Need website.