Which Disney Channel series starred Selena Gomez as Alex Russo?

Which network aired 'SpongeBob SquarePants'? Which network aired 'The Powerpuff Girls' and 'Dexter's Laboratory'? Which network aired 'Hannah Montana'? Who played Hannah Montana / Miley Stewart? Which Disney Channel series starred Hilary Duff? Which Nickelodeon series starred Kenan Thompson and Kel Mitchell as step-brothers? Which Nickelodeon series featured Miranda Cosgrove running a web show? Which Nickelodeon series starred Drake Bell and Josh Peck?