It's been announced this morning that Billie Piper is to leave Doctor Who at the end of this current series (Season 2). Nothing has been said about her exit and the BBC are keeping tight lipped about her departure in an episode called 'Doomsday'.
Another interesting thing to come out of the article is that she is currently filming a BBC adaptation of Philip Pullman's (he of "His Dark Materials" fame) Victorian thriller "Ruby in the Smoke"
Billie Piper To Leave Doctor Who (BBC News Online; Thursday 15th June 2006)
So, who do we reckon will replace her as the Doctor's new assistance?
Continuing the run of c-list singers resurrecting their careers on the show maybe Peter Andre? The Cheeky Girls? Lisa (from Steps)? or maybe even Emma Bunton (Baby Spice)! Actually what about Geri Halliwell?