The BBC is still searching for a permanent presenter after the last one, Angus Deayton, was sacked last year.
Charlotte wants to be more funky
It's another move away from the world of opera for Charlotte.
She's been singing classical music since she was 13 but has admitted she's had enough and wants to sing more funky tunes.
Charlotte's even making her acting debut in a new film called I'll Be There that comes out in June.
It's a musical comedy about a former 80s pop star who discovers he has a teenage daughter.
But we'll be seeing her first during the new series of Have I Got News For You, which begins on April 24.